Citazione APA

Gurmel Singh, V. C., & Sastry G, J. B. P. (1990). Mannual of soil and water conservation practices. Oliver and Boyd.

Stile di citazione Chicago

Gurmel Singh, Venkataraman C., e Joshi B P. Sastry G. Mannual of Soil and Water Conservation Practices. Newdelhi: Oliver and Boyd, 1990.

Citazione MLA

Gurmel Singh, Venkataraman C., e Joshi B P. Sastry G. Mannual of Soil and Water Conservation Practices. Oliver and Boyd, 1990.