How do I get my 9 week old baby to sleep in her crib/cot?

It wont hurt her to sleep in her bouncer for now, if that is what she wants. Just make sure she gets enough time during the day to stretch out. You can also try to make her bed more snug, which is probably the feeling she likes in her bouncer. You can roll a couple of blankets and place them to her sides. As she gets older she will feel more uncomfortable sitting in her bouncer and be more willing to test out the crib. Give her time to go at her own pace, don't rush her.