One thing that you definitely need is a schedule. It took me until my 4th child to learn that a schedule is vital in keeping a child happy and more liable to cooperate with you. Put the baby in the crib, with the bottle, and let her cry for a little while, not like a half hour and stuff like that, but you can stand at the side of the crib when you want to calm the baby, and then stand there while you lay the baby down and caress the babies head, or the back or tummy and legs. This way she knows that you are there, and she is safe. Over time, and a lot of patience, she will learn that you aren't going to take her out of the crib, and that she will get use to being on the schedule, and be more willing to cooperate with it. Hope this helps, good luck to you.
First try to put the baby down and firmly tell her to nap and walk out of the room - of course she will be telling you that she's not sleepy and tell you a whole lecture about the rights of babies to a sleepless day.. But I suppose you have already tried that.. Now it's time for plan B - something that I had to resort to.. It's not easy but it has to be done.. You have to roll up your sleeves and make sure that she's totally exhausted from running/ crawling around, jumping (with your help), playing with toys, sitting next to you when you do things around the house - this way she will be totally worn out by noon, so you can put her down for a nap.. Hope this helps.
I have a 5 month grand daughter we would let her lay where she fell asleep.hope this might help