APA (7th ed.) Citation

Gardner, M. (1969). Further mathetical diversions. Penguin Books.

Chicago Style (17th ed.) Citation

Gardner, Martin. Further Mathetical Diversions. Harmondsworth, Middlesex, Eng: Penguin Books, 1969.

MLA (9th ed.) Citation

Gardner, Martin. Further Mathetical Diversions. Penguin Books, 1969.

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