APA (7th ed.) Citation

Westermann, W. L. (1955). The slave systems of Greek and Roman antiquity. The American Philosophical Society.

Chicago Style (17th ed.) Citation

Westermann, William L. The Slave Systems of Greek and Roman Antiquity. Philadelphia: The American Philosophical Society, 1955.

MLA (8th ed.) Citation

Westermann, William L. The Slave Systems of Greek and Roman Antiquity. The American Philosophical Society, 1955.