APA
Jon Hassler, . (1985). A Green journey. Ballantine Books, New York: .
Chicago
Jon Hassler, . 1985. A Green journey. Ballantine Books, New York: .
Harvard
Jon Hassler, . (1985). A Green journey. Ballantine Books, New York: .
MLA
Jon Hassler, . A Green journey. Ballantine Books, New York: . 1985.