APA (7th ed.) Citation

Gore, A. (1993). Earth In The Balance: Ecology and the Human Spirit. Penguin Books Inc..

Chicago Style (17th ed.) Citation

Gore, Al. Earth In The Balance: Ecology and the Human Spirit. United States of America: Penguin Books Inc., 1993.

MLA (9th ed.) Citation

Gore, Al. Earth In The Balance: Ecology and the Human Spirit. Penguin Books Inc., 1993.