APA استشهاد

Agarwal, S. K. (1997). Environmental issues and themes. A P H pub.

استشهاد بنمط شيكاغو

Agarwal, S. K. Environmental Issues and Themes. New Delhi: A P H pub, 1997.

MLA استشهاد

Agarwal, S. K. Environmental Issues and Themes. A P H pub, 1997.