APA (7th ed.) Citation

Filoramo, G., & Alcock, A. (1990). A history of gnosticism (1. publ.). Blackwell.

Chicago Style (17th ed.) Citation

Filoramo, Giovanni, and Anthony Alcock. A History of Gnosticism. 1. publ. Cambridge, Mass: Blackwell, 1990.

MLA (8th ed.) Citation

Filoramo, Giovanni, and Anthony Alcock. A History of Gnosticism. 1. publ. Blackwell, 1990.

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