APA (7th ed.) Citation

Kinney,Jeff. (2017). Diary of a Wimpy Kid: Old school. Puffin Books.

Chicago Style (17th ed.) Citation

Kinney,Jeff. Diary of a Wimpy Kid: Old School. Great Britain: Puffin Books, 2017.

MLA (9th ed.) Citation

Kinney,Jeff. Diary of a Wimpy Kid: Old School. Puffin Books, 2017.

Warning: These citations may not always be 100% accurate.