APA (7th ed.) Citation

Babcock, E. B., & Clausen, R. E. (1918). Genetics in relation to agriculture. McGraw-Hill Book Company, Inc., [etc., etc.].

Chicago Style (17th ed.) Citation

Babcock, E. B., and Roy Elwood Clausen. Genetics in Relation to Agriculture. New York: McGraw-Hill Book Company, Inc., [etc., etc.], 1918.

MLA (9th ed.) Citation

Babcock, E. B., and Roy Elwood Clausen. Genetics in Relation to Agriculture. McGraw-Hill Book Company, Inc., [etc., etc.], 1918.