APA (7th ed.) Citation

Sagan, F. (1961). Those without shadows. Penguin.

Chicago Style (17th ed.) Citation

Sagan, Francoise. Those Without Shadows. Harmondsworth, Middlesex: Penguin, 1961.

MLA (8th ed.) Citation

Sagan, Francoise. Those Without Shadows. Penguin, 1961.

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