APA (7th ed.) Citation

(1990). Britannica book of the year. Encyclopedia Britannica, Inc..

Chicago Style (17th ed.) Citation

Britannica Book of the Year. Chicago: Encyclopedia Britannica, Inc., 1990.

MLA (9th ed.) Citation

Britannica Book of the Year. Encyclopedia Britannica, Inc., 1990.

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