APA (7th ed.) Citation

Evans, H. E. (1968). Life on a little-known planet. E.P. Dutton.

Chicago Style (17th ed.) Citation

Evans, Howard Ensign. Life on a Little-known Planet. New York: E.P. Dutton, 1968.

MLA (9th ed.) Citation

Evans, Howard Ensign. Life on a Little-known Planet. E.P. Dutton, 1968.