Cita APA

Bova, B. (1990). First contact: The search for extraterrestrial intelligence. Penguin Books.

Citación estilo Chicago

Bova, Ben. First Contact: The Search for Extraterrestrial Intelligence. New York: Penguin Books, 1990.

Cita MLA

Bova, Ben. First Contact: The Search for Extraterrestrial Intelligence. Penguin Books, 1990.

Warning: These citations may not always be 100% accurate.