(1980). The New Encyclopaedia Britannica: In 30 volumes : macropædia : knowledge in depth (Fifteenth edition.). Encyclopaedia Britannica.
Chicago Style (17. basım) AtıfThe New Encyclopaedia Britannica: In 30 Volumes : Macropædia : Knowledge in Depth. Fifteenth edition. Chicago: Encyclopaedia Britannica, 1980.
MLA (8th ed.) AtıfThe New Encyclopaedia Britannica: In 30 Volumes : Macropædia : Knowledge in Depth. Fifteenth edition. Encyclopaedia Britannica, 1980.
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