Cita APA (7a ed.)

Groningen, G. v. (1967). First century gnosticism: Its origin and motifs. E. J. Brill.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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