Cita APA (7th ed.)

ebrary, Inc, & Sackman, D. C. (2010). A companion to American environmental history. Wiley-Blackwell.

Cita Chicago (17th ed.)

ebrary, Inc, i Douglas Cazaux Sackman. A Companion to American Environmental History. Chichester, West Sussex ; Malden, MA: Wiley-Blackwell, 2010.

Cita MLA (9th ed.)

ebrary, Inc, i Douglas Cazaux Sackman. A Companion to American Environmental History. Wiley-Blackwell, 2010.