Preece, W. E. (1967). Encyclopaedia britannica vol-6 (14.). Encyclopaedia Britannica INC.
Chicago Style aipamenaPreece, Warren E. Encyclopaedia Britannica Vol-6. 14. Chicago: Encyclopaedia Britannica INC, 1967.
MLA aipamenaPreece, Warren E. Encyclopaedia Britannica Vol-6. 14. Encyclopaedia Britannica INC, 1967.
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