Cita APA (7th ed.)
Tripathi, R. P., & Singh, H. (1993). Soil erosion and conservation. New Age International.
Cita Chicago (17th ed.)
Tripathi, R. P., i H.P Singh. Soil Erosion and Conservation. Kolkata: New Age International, 1993.
Cita MLA (9th ed.)
Tripathi, R. P., i H.P Singh. Soil Erosion and Conservation. New Age International, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.