APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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