APA (7th ed.) Citation

Groningen, G. v. (1967). First Century Gnosticism: Its Origin and Motifs. E.J. Brill.

Chicago Style (17th ed.) Citation

Groningen, G. van. First Century Gnosticism: Its Origin and Motifs. Leiden: E.J. Brill, 1967.

MLA (9th ed.) Citation

Groningen, G. van. First Century Gnosticism: Its Origin and Motifs. E.J. Brill, 1967.