APA (7th ed.) Citation

Filkin, D. (1997). Stephen Hawking's universe: The cosmos explained. Basic Books.

Chicago Style (17th ed.) Citation

Filkin, David. Stephen Hawking's Universe: The Cosmos Explained. New York: Basic Books, 1997.

MLA (9th ed.) Citation

Filkin, David. Stephen Hawking's Universe: The Cosmos Explained. Basic Books, 1997.

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