APA
Gardner G. T., Stern P. C., . (2002). Environmental problems and human behavior. Boston: Pearson custom publishing.
Chicago
Gardner Gerald T, Stern Paul C, . 2002. Environmental problems and human behavior. Boston: Pearson custom publishing.
Harvard
Gardner G. T., Stern P. C., . (2002). Environmental problems and human behavior. Boston: Pearson custom publishing.
MLA
Gardner Gerald T, Stern Paul C, . Environmental problems and human behavior. Boston: Pearson custom publishing. 2002.