APA (7th ed.) Citation

Thwaite, A. (1978). Twentieth-Century English poetry: An introduction. Heinemann.

Chicago Style (17th ed.) Citation

Thwaite, Anthony. Twentieth-Century English Poetry: An Introduction. London: Heinemann, 1978.

MLA (9th ed.) Citation

Thwaite, Anthony. Twentieth-Century English Poetry: An Introduction. Heinemann, 1978.