APA (7th ed.) Citation

Weckstein, A. M., & De Leon, B. (1960). Graphic survey of biology. Oxford book company.

Chicago Style (17th ed.) Citation

Weckstein, A. M., and Benjamin De Leon. Graphic Survey of Biology. New York: Oxford book company, 1960.

MLA (8th ed.) Citation

Weckstein, A. M., and Benjamin De Leon. Graphic Survey of Biology. Oxford book company, 1960.