APA (7th ed.) Citation

Koepgen, G. (1939). Die Gnosis des Christentums. Otto Müller.

Chicago Style (17th ed.) Citation

Koepgen, Georg. Die Gnosis Des Christentums. Salzburg: Otto Müller, 1939.

MLA (9th ed.) Citation

Koepgen, Georg. Die Gnosis Des Christentums. Otto Müller, 1939.

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