APA (7th ed.) Citation

Calhoun, D. R. (1999). Britannica book of the year 1999. Encyclopaedia Britannica, Inc.

Chicago Style (17th ed.) Citation

Calhoun, David R. Britannica Book of the Year 1999. Encyclopaedia Britannica, Inc, 1999.

MLA (8th ed.) Citation

Calhoun, David R. Britannica Book of the Year 1999. Encyclopaedia Britannica, Inc, 1999.

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