APA (7th ed.) Citation

Paul Jennings. (1987). Unbelievable. Puffin Books.

Chicago Style (17th ed.) Citation

Paul Jennings. Unbelievable. England: Puffin Books, 1987.

MLA (9th ed.) Citation

Paul Jennings. Unbelievable. Puffin Books, 1987.

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