How to stop my dog from barking at people?

I have a dog like that and everytime a person comes in the door she runs under the couch adn yes we have to lock her up in our bathroom but I dont know how to break her sorry

yOU NEED TO TAKE HER TO A PARK AND LET HER SEE PEOPLE AND SHOW HER THAT THESE PEOPLE WILL NOT HURT HER. iT WILL TAKE A WHILE TO GET HER USED TO PEOPLE AGAIN SHE WILL SOONER OR LATER. mY FRIEND HAS A DOG THAT USED TO GET ABUSED AND SHE DID THIS EXACT SAME THING IT TOOK ABOUT A MONTH BUT IT WORKED AND NOW THE DOG TRUST a lot OF PEOPLE NOW. jUST NOT THE PERSON THAT ABUSED IT. tRUST ME IT WORKS. YOU SHOULDNT be embarresed she is just trying to protect herself and maby even you. She may think that a person is trying to abuse you. You just to let her get used to people. If she is vichios with them tell them to back off a little and move closer to her a lot slower.

Well, I have 2 dogs myself.My keeshond she’s very gentle,, but she ALSO barks at everything and everybody (except me and my family.) My half douchsond is the same with your dog. She got beaten up when she was a puppy I felt so sorry she barks as well as my keeshond barks first.

Try and be gentle. Training will take lots and lots of practice. Might want to by those colors that when they bark you can push a button and make them stop. I forgot what their called.