APA (7th ed.) Citation

Encyclopaedia Britannica, I. (1943). The New Encyclopaedia Britannica: Volume IX. Encyclopaedia Britannica, Inc..

Chicago Style (17th ed.) Citation

Encyclopaedia Britannica, Inc. The New Encyclopaedia Britannica: Volume IX. USA: Encyclopaedia Britannica, Inc., 1943.

MLA (9th ed.) Citation

Encyclopaedia Britannica, Inc. The New Encyclopaedia Britannica: Volume IX. Encyclopaedia Britannica, Inc., 1943.

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