APA (7th ed.) Citation

(1990). 1990 Britannica Book of the Year. Encyclopaedia Britannica Inc.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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