APA (7th ed.) Citation

McEvoy, J. P., & Zarate, O. (1999). Introducing Stephen Hawking. Icon Books [u.a.].

Chicago Style (17th ed.) Citation

McEvoy, Joseph P., and Oscar Zarate. Introducing Stephen Hawking. Cambridge: Icon Books [u.a.], 1999.

MLA (9th ed.) Citation

McEvoy, Joseph P., and Oscar Zarate. Introducing Stephen Hawking. Icon Books [u.a.], 1999.