Cita APA (7a ed.)

Sullivan, W. (1966). We are not alone: The search for intelligent life o n other worlds (ed. rev.). Mc Graw-hill.

Cita Chicago Style (17a ed.)

Sullivan, Walter. We Are Not Alone: The Search for Intelligent Life O N Other Worlds. ed. rev. New York: Mc Graw-hill, 1966.

Cita MLA (8a ed.)

Sullivan, Walter. We Are Not Alone: The Search for Intelligent Life O N Other Worlds. ed. rev. Mc Graw-hill, 1966.