APA (7th ed.) Citation

Berbig, C., Berbig, M., Hey, W., & Pfeiffer, W. (1883). Fibel. Perthes.

Chicago Style (17th ed.) Citation

Berbig, Clemens, Max Berbig, Wilhelm Hey, and Wilhelm Pfeiffer. Fibel. Gotha: Perthes, 1883.

MLA (9th ed.) Citation

Berbig, Clemens, et al. Fibel. Perthes, 1883.