APA (7th ed.) Citation

Quigley, M. (1960). The secret project of Sigurd O'Leary. Deutsch.

Chicago Style (17th ed.) Citation

Quigley, Martin. The Secret Project of Sigurd O'Leary. London: Deutsch, 1960.

MLA (8th ed.) Citation

Quigley, Martin. The Secret Project of Sigurd O'Leary. Deutsch, 1960.

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