APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Langer, William L. An Encyclopedia of World History; Ancient, Medieval, and Modern, Chronologically Arranged. Boston: Houghton Mifflin Co, 1952.

MLA (9th ed.) Citation

Langer, William L. An Encyclopedia of World History; Ancient, Medieval, and Modern, Chronologically Arranged. Houghton Mifflin Co, 1952.