Hi, I'm sorta a "newbie" here. Squeaky and Swiper are my 1 1/2 year old yorkies (We have a Bichon also, but he says he is my husband's dog

). Squeaky is my problem pup. She says "no one is gonna be the boss of her"!!

What to do?? I've been trying submission training with her by laying her on her back (and rubbing her tummy, but firmly trying to keep her in place). She'll have none of it. Any advise or good training book (for yorkies) recommendation? Help! Please!