Sure,
Here are some suggestions. First you will need a long lead, cotton, nylon and leather are popular. I like the cotton because they are inexpensive. Now you want a long lead, because you want to train her to come from long distances. I suggest a 20' or 30' lead to start with. You will also need a collar. I only put a collar on a dog when we are going to work. They can get hung up on things otherwise. A nylon collar will work, especially at her size. I don't recommend a chain collar as they can pinch and cause bruises. For a large dog that you need extra control with a prong collar is your best tool. Although it looks wicked, it causes less discomfort than a chain/choke collar. And, most importantly, you will need some TREATS! OK,
www.petedge.com usually has some good prices, I've ordered lots from them, but usually buy in bulk, which helps.
Now that we have the items that we need, we can start. A training session for a pup her age will only last about 5 - 10 minutes, maybe 2 or 3 times a day. You will have to judge for yourself to a certain extent. Each dog is different.
Does she know "sit"? If not, this is a great time to train her to do that, but it's not necessary for her to know it at this time. Ok, put the collar and lead on and put the end of the leash in your hand. Now if she does not know sit, just kind of walk away from her, giving her lead as you walk away so to leave the leash loose. If she follows you around, that's alright. All my guys follow me around where-ever I go. It's a dog thing. When you get a short distance away from her, stop, turn to her and say, "So and So, Come." It does not have to be loud or over forceful, but it should get her attention. Give her a hair of a second to start coming, and then show her the treat and start reeling her in with the leash. Give her the treat when she gets to you. PRAISE HER as you give her the treat. This is supposed to be a great experience for her, so she wants to come to you when you call. Now do it again. She may follow you around for a time because she's thinking about treats. Give her a chance to wander away, or walk away from her, and repeat the above. Again, LOTS of PRAISE when she comes to you. Do this maybe two or three times and end on a positive note. Tell her she's a good girl, etc. etc. but don't over excite her, then they lose focus and forget what they're supposed to be doing.
Keep up this routine until she's coming on a pretty regular basis, it should take maybe 5 or 6 sessions, but don't be discouraged if it takes longer. She WILL get it.
What I do next is remove the treat from the equation. When she comes I give her a treat about half the time and ALWAYS give praise. You can keep reducing the treat until you're not giving any. I throw in a treat to training with my older guys every once and a while. Just to keep the idea in their head that they MIGHT get a treat.
When she's coming every time, or darn near every time with the lead on, you can try it with the lead off. The first few times, call her when she's only a short distance away, 4 or 5 feet at the tops. If she refuses, throw the leash on right away and practice a few times again with the lead on. At the next training session try off lead again. Using a treat when you switch to off lead is good encouragement also. Increase the distance between you and her off lead until you feel comfortable that she will come to you from any distance. There, YOU DID IT!
On a side note. Have her micro-chipped. I take my 4 for walks off lead often. They don't wear collars, which means they don't have their licenses or ID's on them. That's why I micro-chip. The cost is not excessive, and its really worth it. They can never lose it and it can identify them in many circumstances, lost or stolen.
If you have any questions, just ask.