APA (7th ed.) Citation

Langer, W. L. (1952). An encyclopedia of world history, ancient, medieval, and modern, chronologically arranged (Rev. ed.). Houghton Mifflin.

Chicago Style (17th ed.) Citation

Langer, William Leonard. An Encyclopedia of World History, Ancient, Medieval, and Modern, Chronologically Arranged. Rev. ed. Boston: Houghton Mifflin, 1952.

MLA (9th ed.) Citation

Langer, William Leonard. An Encyclopedia of World History, Ancient, Medieval, and Modern, Chronologically Arranged. Rev. ed. Houghton Mifflin, 1952.