एपीए उद्धरण

Thampan, P. K. (1993). Organics in soil health and crop production. Peekay tree crops development foundation.

शिकागो स्टाइल उद्धरण

Thampan, P K. Organics in Soil Health and Crop Production. Cochin: Peekay tree crops development foundation, 1993.

एमएलए उद्धरण

Thampan, P K. Organics in Soil Health and Crop Production. Peekay tree crops development foundation, 1993.