Since the application doesn't specify the quality of the relationship between you and the reference, just the length, I would use the landlady and others you have similar contacts/relations with. You don't have to be friends, or even friendly. You just need a name and a number of someone who generally, even if vaguely, knows your name and some of your particulars. And the best part is, they don't even have to be Canadian or live in Canada. For now, write down the phone numbers of friends and family in your home country, so immigration can call them in the middle of the night. Make sure to remind your friends to give them an earful when they call about how inconsiderate they are to be calling at such an hour.