APA Edition Citation

(1975). Encyclopaedia Britannica (15th ed.). Encyclopaedia Britannica.

Chicago Edition Citation

Encyclopaedia Britannica. 15th ed. London: Encyclopaedia Britannica, 1975.

MLA Edition Citation

Encyclopaedia Britannica. 15th ed. Encyclopaedia Britannica, 1975.

Warning: These citations may not always be 100% accurate.