APA (7th ed.) Citation

Clark, F. L. G., & Titmuss, R. M. (1939). Our food problem; a study of national security. Penguin Books limited.

Chicago Style (17th ed.) Citation

Clark, Frederick Le Gros, and Richard Morris Titmuss. Our Food Problem; a Study of National Security. Harmondsworth, Middlesex, England: Penguin Books limited, 1939.

MLA (9th ed.) Citation

Clark, Frederick Le Gros, and Richard Morris Titmuss. Our Food Problem; a Study of National Security. Penguin Books limited, 1939.