APA (7th ed.) Citation

Kinney, J. (2007). Diary of a wimpy kid: Greg Heffley's journal. Amulet Books.

Chicago Style (17th ed.) Citation

Kinney, Jeff. Diary of a Wimpy Kid: Greg Heffley's Journal. New York: Amulet Books, 2007.

MLA (9th ed.) Citation

Kinney, Jeff. Diary of a Wimpy Kid: Greg Heffley's Journal. Amulet Books, 2007.