APA (7th ed.) Citation

Sagan, C. (2011). Pale blue dot: A vision of the human future in space.

Chicago Style (17th ed.) Citation

Sagan, Carl. Pale Blue Dot: A Vision of the Human Future in Space. 2011.

MLA (8th ed.) Citation

Sagan, Carl. Pale Blue Dot: A Vision of the Human Future in Space. 2011.

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