APA (7th ed.) Citation

Boslough, J. (1985). Stephen Hawking's universe (1. ed.). Morrow.

Chicago Style (17th ed.) Citation

Boslough, John. Stephen Hawking's Universe. 1. ed. New York, NY: Morrow, 1985.

MLA (9th ed.) Citation

Boslough, John. Stephen Hawking's Universe. 1. ed. Morrow, 1985.