Goldfarb, T. D. (1987). Taking sides clashing views on controversial Environmental issues (2ª ed.). The Dushkin.
Chicago-viite (17. p.)Goldfarb, Theodere D. Taking Sides Clashing Views on Controversial Environmental Issues. 2ª ed. The Dushkin, 1987.
MLA-viite (9. p.)Goldfarb, Theodere D. Taking Sides Clashing Views on Controversial Environmental Issues. 2ª ed. The Dushkin, 1987.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.