Although I don't see the point in it...
Why do you need a bark, when she is signalling by jumping at you?
My Border Collie
hates barking and after a long time trying to make her signalling by barking when she found the misper, I now decided to train her by coming back to me and jumping at me when her search was successfull. From that moment on she was the happiest dog in the world - because she doesn't need to bark
Anyhow. To get a dog to bark, you first try to find out what she loves most: toys or food. If it is a toy, you make her really want it, make it exciting, shake it in front of her then hide it in your closed arms and look ecpectingly at her. Usually a dog would bark to get the toy. (The same for food) First you say well done and pass the toy to the dog after only
one bark. Then you make the dog bark longer before you hand out the toy... My young Golden Retriever learned it very quick that way
, but as I said, my Border Collie just hates it...