APA (7th ed.) Citation

Turner, B. L., & Brush, S. B. (1987). Comparative farming systems. Guilford.

Chicago Style (17th ed.) Citation

Turner, B. L., and Stephen B. Brush. Comparative Farming Systems. New York [etc.]: Guilford, 1987.

MLA (9th ed.) Citation

Turner, B. L., and Stephen B. Brush. Comparative Farming Systems. Guilford, 1987.