APA (7th ed.) Zitazioa

Duffy, B. K., & Besel, R. D. (2016). Green Voices: Defending Nature and the Environment in American Civic Discourse. State University of New York Press.

Chicago Style (17th ed.) Zitazioa

Duffy, Bernard K., eta Richard D. Besel. Green Voices: Defending Nature and the Environment in American Civic Discourse. Albany, NY: State University of New York Press, 2016.

MLA (9th ed.) Zitazioa

Duffy, Bernard K., eta Richard D. Besel. Green Voices: Defending Nature and the Environment in American Civic Discourse. State University of New York Press, 2016.