APA (7th ed.) Citation

Chbosky, S. (1999). The perks of being a wallflower. Gallery Books.

Chicago Style (17th ed.) Citation

Chbosky, Stephen. The Perks of Being a Wallflower. New York: Gallery Books, 1999.

MLA (9th ed.) Citation

Chbosky, Stephen. The Perks of Being a Wallflower. Gallery Books, 1999.