Citazione APA

Ghildyal, B. P., & Gupta, R. P. (2002). Soil structure: Problems and management (Nil.). ICAR.

Stile di citazione Chicago

Ghildyal, B P., e R P. Gupta. Soil Structure: Problems and Management. Nil. New Delhi: ICAR, 2002.

Citazione MLA

Ghildyal, B P., e R P. Gupta. Soil Structure: Problems and Management. Nil. ICAR, 2002.