APA (7th ed.) Citation

(1985). Britannica book of the year: Britannica world data. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Britannica Book of the Year: Britannica World Data. Chicago: Encyclopaedia Britannica, 1985.

MLA (9th ed.) Citation

Britannica Book of the Year: Britannica World Data. Encyclopaedia Britannica, 1985.

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