Cita APA (7a ed.)

Grennes, T., Johnson, P. R., & Thursby, M. (1978). The economics of world grain trade. Praeger.

Cita Chicago Style (17a ed.)

Grennes, Thomas, Paul R. Johnson, y Marie Thursby. The Economics of World Grain Trade. New York: Praeger, 1978.

Cita MLA (8a ed.)

Grennes, Thomas, et al. The Economics of World Grain Trade. Praeger, 1978.