APA ציטוט

World Resources Institute. (1991). The ... information please environmental almanac. Houghton Mifflin Co.

Chicago Style (17th ed.) Citation

World Resources Institute. The ... Information Please Environmental Almanac. Boston: Houghton Mifflin Co, 1991.

ציטוט MLA

World Resources Institute. The ... Information Please Environmental Almanac. Houghton Mifflin Co, 1991.