APA-viite (7. p.)

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-viite (17. p.)

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

MLA-viite (9. p.)

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