Depends if I make references at all. If it's a run of the mill essay in college then I won't. For pieces such as my Extended Essay, my Theory of Knowledge essay and pieces of coursework (History, Psychology and English) then I fully referenced the essays themselves. Otherwise I never bothered because there was no need to. Referencing can be a bit of a pain sometimes. However at university I know I'll have to do more of it, but I imagine it won't be too painful when I've gotten into the habit of it.
Don't think I've ever made a jokey reference. I've tried to get people to reference me though when I've helped them with their essays.