APA (7th ed.) Citation

World Resources Institute. (1993). The 1993 Information Please Environmental Almanac. Houghton Mifflin.

Chicago Style (17th ed.) Citation

World Resources Institute. The 1993 Information Please Environmental Almanac. Boston, New York: Houghton Mifflin, 1993.

MLA (9th ed.) Citation

World Resources Institute. The 1993 Information Please Environmental Almanac. Houghton Mifflin, 1993.