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APA-referens

Ruddle, K. (1974). The Yukpa cultivation system: A study of shifting cultivation in Colombia and Venezuela. University of California Press.

Chicago-stil citat

Ruddle, Kenneth. The Yukpa Cultivation System: A Study of Shifting Cultivation in Colombia and Venezuela. Berkeley: University of California Press, 1974.

MLA-referens

Ruddle, Kenneth. The Yukpa Cultivation System: A Study of Shifting Cultivation in Colombia and Venezuela. University of California Press, 1974.

Harvard-stil citat

Ruddle, K. 1974. The Yukpa cultivation system: A study of shifting cultivation in Colombia and Venezuela. Berkeley: University of California Press.

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