APA (7th ed.) Citation

Kinney, J. (2007). Dairy of a Wimpy Kid: Old School. Penguin Books.

Chicago Style (17th ed.) Citation

Kinney, Jeff. Dairy of a Wimpy Kid: Old School. London: Penguin Books, 2007.

MLA (9th ed.) Citation

Kinney, Jeff. Dairy of a Wimpy Kid: Old School. Penguin Books, 2007.