Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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