Cita APA (7a ed.)

Skurzynski, G. (2004). Are we alone?: Scientists search for life in space. National Geographic Society.

Cita Chicago Style (17a ed.)

Skurzynski, Gloria. Are We Alone?: Scientists Search for Life in Space. Washington, DC: National Geographic Society, 2004.

Cita MLA (8a ed.)

Skurzynski, Gloria. Are We Alone?: Scientists Search for Life in Space. National Geographic Society, 2004.

Precaución: Estas citas no son 100% exactas.