APA (7th ed.) Citation

(1971). Encyclopaedia Britannica. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Encyclopaedia Britannica. Chicago: Encyclopaedia Britannica, 1971.

MLA (9th ed.) Citation

Encyclopaedia Britannica. Encyclopaedia Britannica, 1971.

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