Cita APA (7th ed.)

Shepherd, G. S., & Futrell, G. A. (1969). Marketing farm products; economic analysis (5th ed.). Iowa State University Press.

Cita Chicago (17th ed.)

Shepherd, Geoffrey Seddon, i Gene A. Futrell. Marketing Farm Products; Economic Analysis. 5th ed. Ames: Iowa State University Press, 1969.

Cita MLA (9th ed.)

Shepherd, Geoffrey Seddon, i Gene A. Futrell. Marketing Farm Products; Economic Analysis. 5th ed. Iowa State University Press, 1969.