Singh, S. S. Crop management (BP-89/91.). Kalyani Publishers.
Citación estilo ChicagoSingh, S. S. Crop Management. BP-89/91. New Delhi: Kalyani Publishers.
Cita MLASingh, S. S. Crop Management. BP-89/91. Kalyani Publishers.
Warning: These citations may not always be 100% accurate.