APA

Graduate School U., International agricultural cooperation, . (1960). The international age in agriculture. [Washington: .

Chicago

Graduate School USDA, International agricultural cooperation, . 1960. The international age in agriculture. [Washington: .

Harvard

Graduate School U., International agricultural cooperation, . (1960). The international age in agriculture. [Washington: .

MLA

Graduate School USDA, International agricultural cooperation, . The international age in agriculture. [Washington: . 1960.