APA استشهاد

Fouzia Ishaq & Khan, A. (2014). Encyclopedia of environmental science. Discovery Publishing House.

استشهاد بنمط شيكاغو

Fouzia Ishaq و Amir Khan. Encyclopedia of Environmental Science. New Delhi: Discovery Publishing House, 2014.

MLA استشهاد

Fouzia Ishaq و Amir Khan. Encyclopedia of Environmental Science. Discovery Publishing House, 2014.