APA (7th ed.) Citation

Dietrich, M., Mayer, W., & Loretz, O. (1989). Sikkanum "Betyle".

Chicago Style (17th ed.) Citation

Dietrich, M., Walter Mayer, and O. Loretz. Sikkanum "Betyle". 1989.

MLA (8th ed.) Citation

Dietrich, M., et al. Sikkanum "Betyle". 1989.