APA (7th ed.) Citation

Frey, C., & Frey, C. M. (1998). Hitlers schwarzer Orden. Drefa MDR.

Chicago Style (17th ed.) Citation

Frey, Christian, and Christian Mitarb Frey. Hitlers Schwarzer Orden. Drefa MDR, 1998.

MLA (8th ed.) Citation

Frey, Christian, and Christian Mitarb Frey. Hitlers Schwarzer Orden. Drefa MDR, 1998.

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