APA (7th ed.) Citation

Mortimer, R., & Grant, D. (1944). Duncan Grant. Penguin Books.

Chicago Style (17th ed.) Citation

Mortimer, Raymond, and Duncan Grant. Duncan Grant. Harmondsworth, Middlesex, England: Penguin Books, 1944.

MLA (9th ed.) Citation

Mortimer, Raymond, and Duncan Grant. Duncan Grant. Penguin Books, 1944.