APA (7th ed.) Citation

Duncan, R. (1968). How to make enemies. Rupert Hart-Davis.

Chicago Style (17th ed.) Citation

Duncan, Ronald. How to Make Enemies. London: Rupert Hart-Davis, 1968.

MLA (9th ed.) Citation

Duncan, Ronald. How to Make Enemies. Rupert Hart-Davis, 1968.

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