APA (7th ed.) Citation

Robinson, W. W., & Robinson, I. B. (1934). Ancient animals. The Macmillian company.

Chicago Style (17th ed.) Citation

Robinson, W. W., and Irene B. Robinson. Ancient Animals. New York: The Macmillian company, 1934.

MLA (9th ed.) Citation

Robinson, W. W., and Irene B. Robinson. Ancient Animals. The Macmillian company, 1934.