APA (7th ed.) Citation

Filkin, D. (1997). Stephen Hawking's universe (1. ed.). Basic Books.

Chicago Style (17th ed.) Citation

Filkin, David. Stephen Hawking's Universe. 1. ed. New York: Basic Books, 1997.

MLA (9th ed.) Citation

Filkin, David. Stephen Hawking's Universe. 1. ed. Basic Books, 1997.