APA (7th ed.) Citation

(1966). Britannica book of the year. Encyclopaedia Britannica Inc.

Chicago Style (17th ed.) Citation

Britannica Book of the Year. Chicago, Ill. [u.a.]: Encyclopaedia Britannica Inc, 1966.

MLA (8th ed.) Citation

Britannica Book of the Year. Encyclopaedia Britannica Inc, 1966.