Cita APA (7a ed.)

Gray, T. W., & Kraenzle, C. A. (2002). Problems and issues facing farmer cooperatives. United States Rural Business-Cooperative Service.

Cita Chicago Style (17a ed.)

Gray, Thomas W., y Charles A. Kraenzle. Problems and Issues Facing Farmer Cooperatives. Washington: United States Rural Business-Cooperative Service, 2002.

Cita MLA (9a ed.)

Gray, Thomas W., y Charles A. Kraenzle. Problems and Issues Facing Farmer Cooperatives. United States Rural Business-Cooperative Service, 2002.