Papaer training (in my opinion) just teaches the dog it is acceptable to toilet in the house. From my own experience, it is alot harder to fully housetrain a dog who has been paper trained than one who has been taken outside.
Also from experience- the one time Most people forget their dog will need to pee is when they have been exited- ie, a family member coming home, a new person coming in, and when playing- So remember (as well as regularly and after sleep, eating and drinking) to take your pup out when a family member or someone new comes in, and every 20 mins or so during play.
Both my dogs will pee on comand, as when they were little, after they had been just getting praise for peeing outside, I started to add the command 'go pee' just before the praise.
The funniest thinng I ever saw was at the train station- a woman and her little dog on the gras, she was trying to get it to pee and was saying (in a sickly sweet voice) 'Fifi, please go wee wee for mummy'. The dog looked at her as if she was mad and just sat down! I walked over with my dog, said 'go pee' and she did, the woman nearly missed the train, and her dog peed on the floor after about half an hour!

Lol
Good luck!
x