APA (7th ed.) Citation

Olmstead, А. T. (1962). History of the Persian Empire.

Chicago Style (17th ed.) Citation

Olmstead, А. T. History of the Persian Empire. Chicago, Ill, 1962.

MLA (8th ed.) Citation

Olmstead, А. T. History of the Persian Empire. 1962.

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