APA (7th ed.) Citation

Steel, R., & Harvey, A. P. (1979). The Encyclopedia of prehistoric life. McGraw-Hill.

Chicago Style (17th ed.) Citation

Steel, Rodney, and Anthony P. Harvey. The Encyclopedia of Prehistoric Life. New York: McGraw-Hill, 1979.

MLA (9th ed.) Citation

Steel, Rodney, and Anthony P. Harvey. The Encyclopedia of Prehistoric Life. McGraw-Hill, 1979.