एपीए उद्धरण

Balakrishnan, M. (1988). Environmental issues: Problems and solutions.

शिकागो स्टाइल उद्धरण

Balakrishnan, M. Environmental Issues: Problems and Solutions. University of Kerala, TVPM, 1988.

एमएलए उद्धरण

Balakrishnan, M. Environmental Issues: Problems and Solutions. 1988.