APA (7th ed.) Citation

White, M., & Gribbin, J. (1993). Stephen Hawking. Círculo de Leitores.

Chicago Style (17th ed.) Citation

White, Michael, and John Gribbin. Stephen Hawking. Círculo de Leitores, 1993.

MLA (8th ed.) Citation

White, Michael, and John Gribbin. Stephen Hawking. Círculo de Leitores, 1993.

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