APA (7th ed.) Citation

Sayers, D. (1962). The unpleasantness at the Bellona Club. Longmans Green.

Chicago Style (17th ed.) Citation

Sayers, D. The Unpleasantness at the Bellona Club. London: Longmans Green, 1962.

MLA (9th ed.) Citation

Sayers, D. The Unpleasantness at the Bellona Club. Longmans Green, 1962.