APA (7th ed.) Citation

Steffen, J. (1977). Jochen Steffen, Adalbert Wiemers.

Chicago Style (17th ed.) Citation

Steffen, Joachim. Jochen Steffen, Adalbert Wiemers. 1977.

MLA (9th ed.) Citation

Steffen, Joachim. Jochen Steffen, Adalbert Wiemers. 1977.

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