APA (7th ed.) Citation

Layton, B. (1980). The Rediscovery of Gnosticism. Volume 1. The School of Valentinus. Studies in the history of religions.

Chicago Style (17th ed.) Citation

Layton, Bentley. "The Rediscovery of Gnosticism. Volume 1. The School of Valentinus." Studies in the History of Religions 1980.

MLA (8th ed.) Citation

Layton, Bentley. "The Rediscovery of Gnosticism. Volume 1. The School of Valentinus." Studies in the History of Religions, 1980.

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