APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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