Cita APA (7th ed.)

Singh, S. S. Crop management (BP-89/91.). Kalyani Publishers.

Cita Chicago (17th ed.)

Singh, S. S. Crop Management. BP-89/91. New Delhi: Kalyani Publishers.

Cita MLA (9th ed.)

Singh, S. S. Crop Management. BP-89/91. Kalyani Publishers.