APA (7th ed.) Citation

(1974). Encyclopedia Britannica Volume 18. Encyclopedia Britainnica.

Chicago Style (17th ed.) Citation

Encyclopedia Britannica Volume 18. Chicago: Encyclopedia Britainnica, 1974.

MLA (9th ed.) Citation

Encyclopedia Britannica Volume 18. Encyclopedia Britainnica, 1974.

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