Gurmel Singh, V. C., & Sastry G, J. B. P. (1990). Mannual of soil and water conservation practices. Oliver and Boyd.
Chicago-стиль цитированияGurmel Singh, Venkataraman C., and Joshi B P. Sastry G. Mannual of Soil and Water Conservation Practices. Newdelhi: Oliver and Boyd, 1990.
MLA-цитированиеGurmel Singh, Venkataraman C., and Joshi B P. Sastry G. Mannual of Soil and Water Conservation Practices. Oliver and Boyd, 1990.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.