APA (7th ed.) Citation

Helen Macinnes. (1979). Prelude to Terror. Companion Book Club.

Chicago Style (17th ed.) Citation

Helen Macinnes. Prelude to Terror. London: Companion Book Club, 1979.

MLA (9th ed.) Citation

Helen Macinnes. Prelude to Terror. Companion Book Club, 1979.

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