APA (7th ed.) Citation

Ogilvy, C. S. (1972). Tomorrow's math; unsolved problems for the amateur (Second edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Ogilvy, C. Stanley. Tomorrow's Math; Unsolved Problems for the Amateur. Second edition. New York: Oxford University Press, 1972.

MLA (9th ed.) Citation

Ogilvy, C. Stanley. Tomorrow's Math; Unsolved Problems for the Amateur. Second edition. Oxford University Press, 1972.