APA (7th ed.) Citation

Clark, G. S., & Davies, E. N. (1962). "O" level tests in geography. Methuen.

Chicago Style (17th ed.) Citation

Clark, Gordon Screeton, and E. N. Davies. "O" Level Tests in Geography. London: Methuen, 1962.

MLA (9th ed.) Citation

Clark, Gordon Screeton, and E. N. Davies. "O" Level Tests in Geography. Methuen, 1962.