Cita APA (7a ed.)

Sagan, C., & Druyan, A. (2006). The varieties of scientific experience: A personal view of the search for God. Penguin Press.

Cita Chicago Style (17a ed.)

Sagan, Carl, y Ann Druyan. The Varieties of Scientific Experience: A Personal View of the Search for God. New York: Penguin Press, 2006.

Cita MLA (9a ed.)

Sagan, Carl, y Ann Druyan. The Varieties of Scientific Experience: A Personal View of the Search for God. Penguin Press, 2006.