Cita APA (7a ed.)

Bahrt, C., & Hambidge, G. (1941). Hunger signs in crops: A symposium. Américan Society of Agronomy and the National Fertilizer Association.

Cita Chicago Style (17a ed.)

Bahrt, C.M, y G. Hambidge. Hunger Signs in Crops: A Symposium. Washington, DC: Américan Society of Agronomy and the National Fertilizer Association, 1941.

Cita MLA (8a ed.)

Bahrt, C.M, y G. Hambidge. Hunger Signs in Crops: A Symposium. Américan Society of Agronomy and the National Fertilizer Association, 1941.