APA (7th ed.) Citation

Duffy, C. A. (2004). Doris the giant. Penguin Books.

Chicago Style (17th ed.) Citation

Duffy, Carol Ann. Doris the Giant. England: Penguin Books, 2004.

MLA (9th ed.) Citation

Duffy, Carol Ann. Doris the Giant. Penguin Books, 2004.

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