APA (7th ed.) Citation

Rennison, L. (2003). It's ok, i'm wearing really big knickers! Picacadilly Press.

Chicago Style (17th ed.) Citation

Rennison, Louise. It's Ok, I'm Wearing Really Big Knickers! London: Picacadilly Press, 2003.

MLA (9th ed.) Citation

Rennison, Louise. It's Ok, I'm Wearing Really Big Knickers! Picacadilly Press, 2003.