APA
Food and Agriculture Organization of the United Nations. [from old c atalog], Huffnagel, . (1961). Agriculture in Ethiopia. Rome: .
Chicago
Food and Agriculture Organization of the United Nations. [from old c atalog], Huffnagel, . 1961. Agriculture in Ethiopia. Rome: .
Harvard
Food and Agriculture Organization of the United Nations. [from old c atalog], Huffnagel, . (1961). Agriculture in Ethiopia. Rome: .
MLA
Food and Agriculture Organization of the United Nations. [from old c atalog], Huffnagel, . Agriculture in Ethiopia. Rome: . 1961.