APA引文

Kurtzig, M. E. (1974). Agricultural production and trade. U.S. Dept. of Agriculture, Economic Research Service.

Chicago Style (17th ed.) Citation

Kurtzig, Michael E. Agricultural Production and Trade. [Washington]: U.S. Dept. of Agriculture, Economic Research Service, 1974.

MLA引文

Kurtzig, Michael E. Agricultural Production and Trade. U.S. Dept. of Agriculture, Economic Research Service, 1974.