Cita APA (7a ed.)

Ritson, C. (1977). Agricultural economics, principles and policy (1st edition.). St.Martin's Press.

Cita Chicago Style (17a ed.)

Ritson, Christopher. Agricultural Economics, Principles and Policy. 1st edition. New York: St.Martin's Press, 1977.

Cita MLA (8a ed.)

Ritson, Christopher. Agricultural Economics, Principles and Policy. 1st edition. St.Martin's Press, 1977.