Citazione Stile APA (7a Edizione)

Hughes, D. J. (2009). An environmental history of the world: Humankind's changing role in the community of life (Second edition.). AUWSF (018249).

Citazione stile Chigago Style (17a edizione)

Hughes, Donald J. An Environmental History of the World: Humankind's Changing Role in the Community of Life. Second edition. London: AUWSF (018249), 2009.

Citatione MLA (9a ed.)

Hughes, Donald J. An Environmental History of the World: Humankind's Changing Role in the Community of Life. Second edition. AUWSF (018249), 2009.