Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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