APA (7th ed.) Citation

Penney, D. E. (1972). Perspectives in mathematics. W. A. Benjamin.

Chicago Style (17th ed.) Citation

Penney, David E. Perspectives in Mathematics. Menlo Park, Calif: W. A. Benjamin, 1972.

MLA (9th ed.) Citation

Penney, David E. Perspectives in Mathematics. W. A. Benjamin, 1972.