APA (7th ed.) Citation

Olmstead, A. T. (1959). History of the Persian empire A phoenix book.

Chicago Style (17th ed.) Citation

Olmstead, Albert T. "History of the Persian Empire." A Phoenix Book 1959.

MLA (9th ed.) Citation

Olmstead, Albert T. "History of the Persian Empire." A Phoenix Book, 1959.

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