APA (7th ed.) Citation

Clark, H. T. (1943). 20th century workbook in biology (Rev. ed.). Follett Publishing Company.

Chicago Style (17th ed.) Citation

Clark, Homer T. 20th Century Workbook in Biology. Rev. ed. Chicago: Follett Publishing Company, 1943.

MLA (8th ed.) Citation

Clark, Homer T. 20th Century Workbook in Biology. Rev. ed. Follett Publishing Company, 1943.