Cita APA (7a ed.)

Aschhoff, G., & Henningsen, E. (1986). The German cooperative system: Its history, structure and strength. Fritz Knapp.

Cita Chicago Style (17a ed.)

Aschhoff, Gunther, y Eckart Henningsen. The German Cooperative System: Its History, Structure and Strength. Frankfurt am Main: Fritz Knapp, 1986.

Cita MLA (9a ed.)

Aschhoff, Gunther, y Eckart Henningsen. The German Cooperative System: Its History, Structure and Strength. Fritz Knapp, 1986.