APA (7th ed.) Citation

Bark, W. C. (1958). Origins of the medieval world. Stanford studies in history, economics, and political science.

Chicago Style (17th ed.) Citation

Bark, William Carroll. "Origins of the Medieval World." Stanford Studies in History, Economics, and Political Science 1958.

MLA (9th ed.) Citation

Bark, William Carroll. "Origins of the Medieval World." Stanford Studies in History, Economics, and Political Science, 1958.

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