Cita APA

Redfern, R. 1., Hincks, G. 1., & Sagan, C. 1. (1980). Corridors of time: 1,700,000,000 years of earth at Grand Canyon. New York, N.Y.: Times Books.

Citación estilo Chicago

Redfern, Ron 1920-, Gary 1949- Hincks, y Carl 1934-1996 Sagan. Corridors of Time: 1,700,000,000 Years of Earth At Grand Canyon. New York, N.Y.: Times Books, 1980.

Cita MLA

Redfern, Ron 1920-, Gary 1949- Hincks, y Carl 1934-1996 Sagan. Corridors of Time: 1,700,000,000 Years of Earth At Grand Canyon. New York, N.Y.: Times Books, 1980.