एपीए उद्धरण

Gupta, H. M. (2005). Organic farming and sustainable Agriculture. ABD Publisher.

शिकागो स्टाइल उद्धरण

Gupta, Hari Mohan. Organic Farming and Sustainable Agriculture. Jaipur: ABD Publisher, 2005.

एमएलए उद्धरण

Gupta, Hari Mohan. Organic Farming and Sustainable Agriculture. ABD Publisher, 2005.