Johnson, M. B., & Johnson, T. L. (1994). Study guide to accompany: Seitz, Nelson, Harcrow, Economics of resources, agriculture, and food. New York: McGraw-Hill.
Chicago-стиль цитированияJohnson, Marvin B., và Tera L. Johnson. Study Guide to Accompany: Seitz, Nelson, Harcrow, Economics of Resources, Agriculture, and Food. New York: McGraw-Hill, 1994.
MLA-цитированиеJohnson, Marvin B., và Tera L. Johnson. Study Guide to Accompany: Seitz, Nelson, Harcrow, Economics of Resources, Agriculture, and Food. New York: McGraw-Hill, 1994.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.