APA (7th ed.) Citation

Gras, N. S. B. (1922). An introduction to economic history. Harper & Bros..

Chicago Style (17th ed.) Citation

Gras, Norman Scott Brien. An Introduction to Economic History. New York, London: Harper & Bros., 1922.

MLA (8th ed.) Citation

Gras, Norman Scott Brien. An Introduction to Economic History. Harper & Bros., 1922.

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