APA

Tomek W. G., . (1990). Agricultural product prices. New York: Cornell University.

Chicago

Tomek William G, . 1990. Agricultural product prices. New York: Cornell University.

Harvard

Tomek W. G., . (1990). Agricultural product prices. New York: Cornell University.

MLA

Tomek William G, . Agricultural product prices. New York: Cornell University. 1990.