APA (7th ed.) Citation

King, K. L. (2003). What is gnosticism? Belknap.

Chicago Style (17th ed.) Citation

King, Karen L. What Is Gnosticism? Cambridge, Mass. [u.a.]: Belknap, 2003.

MLA (8th ed.) Citation

King, Karen L. What Is Gnosticism? Belknap, 2003.