एपीए उद्धरण

U ASWATHANARAYANA. (1999). Soil resources and the environment. Enfield, New Hampshire: Science.

शिकागो स्टाइल उद्धरण

U ASWATHANARAYANA. Soil Resources and the Environment. Enfield, New Hampshire: Science, 1999.

एमएलए उद्धरण

U ASWATHANARAYANA. Soil Resources and the Environment. Enfield, New Hampshire: Science, 1999.