APA (7th ed.) Citation

Summerfield, G. (1974). Worlds: Seven modern poets. Penguin Books Ltd..

Chicago Style (17th ed.) Citation

Summerfield, Geoffrey. Worlds: Seven Modern Poets. New York: Penguin Books Ltd., 1974.

MLA (9th ed.) Citation

Summerfield, Geoffrey. Worlds: Seven Modern Poets. Penguin Books Ltd., 1974.

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