APA (7th ed.) Citation

Encyclopaedia Britannica. (1938). Britannica book of the year. Encyclopaedia Britannica, Inc.

Chicago Style (17th ed.) Citation

Encyclopaedia Britannica. Britannica Book of the Year. Chicago: Encyclopaedia Britannica, Inc, 1938.

MLA (9th ed.) Citation

Encyclopaedia Britannica. Britannica Book of the Year. Encyclopaedia Britannica, Inc, 1938.

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