MLA

Gore, Albert. Earth In the Balance : Ecology and the Human Spirit. Boston: Houghton Mifflin, 1992.

APA

Gore, A. (1992). Earth in the balance : ecology and the human spirit. Boston: Houghton Mifflin.

Chicago

Gore, Albert, Earth In the Balance : Ecology and the Human Spirit. Boston: Houghton Mifflin,, 1992.