APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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