Cita APA

Sagan, C. (1994). Pale blue dot: A vision of the human future in space. New York: Random House.

Citación estilo Chicago

Sagan, Carl. Pale Blue Dot: A Vision of the Human Future in Space. New York: Random House, 1994.

Cita MLA

Sagan, Carl. Pale Blue Dot: A Vision of the Human Future in Space. New York: Random House, 1994.