APA

Benco N. L., Watson P. J. & Cowan C. W. (1992). The origins of agriculture : an international perspective. Washington: Smithsonian Institution Press.

Chicago

Benco Nancy L, Watson Patty Jo and Cowan C Wesley. 1992. The origins of agriculture : an international perspective. Washington: Smithsonian Institution Press.

Harvard

Benco N. L., Watson P. J. and Cowan C. W. (1992). The origins of agriculture : an international perspective. Washington: Smithsonian Institution Press.

MLA

Benco Nancy L, Watson Patty Jo and Cowan C Wesley. The origins of agriculture : an international perspective. Washington: Smithsonian Institution Press. 1992.