APA-ийн эшлэл(7 дахь хэвлэлт)

WESTERMANN, W. L. (1955). The Slave systems of Greek and Roman antiquity. The American philosophical society.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

WESTERMANN, William L. The Slave Systems of Greek and Roman Antiquity. Philadelphia: The American philosophical society, 1955.

MLA -ийн эшлэл (9 дэх хэвлэлт)

WESTERMANN, William L. The Slave Systems of Greek and Roman Antiquity. The American philosophical society, 1955.