APA-viite

Cunnigham William P. (2005). Environmental science: A global concern. McGraw Hill.

Chicago-tyylinen lähdeviittaus

Cunnigham William P. Environmental Science: A Global Concern. London: McGraw Hill, 2005.

MLA-viite

Cunnigham William P. Environmental Science: A Global Concern. McGraw Hill, 2005.