APA (7th ed.) Citation

Langer, W. L. (1948). An encyclopedia of world history: Ancient, medieval, and modern, chronologically arranged (Rev. ed.). Houghton Mifflin.

Chicago Style (17th ed.) Citation

Langer, William L. An Encyclopedia of World History: Ancient, Medieval, and Modern, Chronologically Arranged. Rev. ed. Boston: Houghton Mifflin, 1948.

MLA (9th ed.) Citation

Langer, William L. An Encyclopedia of World History: Ancient, Medieval, and Modern, Chronologically Arranged. Rev. ed. Houghton Mifflin, 1948.