एपीए उद्धरण

Gupta, P. (2012). Soil, plant, water and fertilizer analysis (2.). Agrobios.

शिकागो स्टाइल उद्धरण

Gupta, P.K. Soil, Plant, Water and Fertilizer Analysis. 2. India: Agrobios, 2012.

एमएलए उद्धरण

Gupta, P.K. Soil, Plant, Water and Fertilizer Analysis. 2. Agrobios, 2012.