APA (7th ed.) Citation

Thomassen, E. (2006). The spiritual seed: The church of the Valentinians. Brill.

Chicago Style (17th ed.) Citation

Thomassen, Einar. The Spiritual Seed: The Church of the Valentinians. Leiden [etc.]: Brill, 2006.

MLA (9th ed.) Citation

Thomassen, Einar. The Spiritual Seed: The Church of the Valentinians. Brill, 2006.

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