APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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