Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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