APA Edition Citation

Langer, W. L. (1972). Encyclopedia of world history. George G Harrap.

Chicago Edition Citation

Langer, William L. Encyclopedia of World History. London: George G Harrap, 1972.

MLA Edition Citation

Langer, William L. Encyclopedia of World History. George G Harrap, 1972.

Warning: These citations may not always be 100% accurate.