Have you tried this;
When she pees on the floor, soak some of her urine onto newspaper or even better a puppy toilet pad, just a little so it gets her smell on it, and then show it to her, then hopefully she should pee on this the next time, when it becomes too wet just repeat the soacking up procedure again.
Shouting at her will only frighten her and make her wee more in fear, she is still a baby and does not realise what she is doing wrong...she needs lots and lots of praise and cuddles.
Give her another few months yet...good luck