एपीए उद्धरण

Agarwal, S. K. (1997). Environmental issues and themes.

शिकागो स्टाइल उद्धरण

Agarwal, S K. Environmental Issues and Themes. New Delhi, APH Publishing Corporation, 1997.

एमएलए उद्धरण

Agarwal, S K. Environmental Issues and Themes. 1997.