Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.