APA (7th ed.) Citation

Encyclopaedia Britannica, Inc, & Sparks, K. J. (2009). Encyclopaedia Britannica 2009 book of the year. Encyclopaedia Britannica, Inc.

Chicago Style (17th ed.) Citation

Encyclopaedia Britannica, Inc, and Karen Jacobs Sparks. Encyclopaedia Britannica 2009 Book of the Year. Chicago: Encyclopaedia Britannica, Inc, 2009.

MLA (9th ed.) Citation

Encyclopaedia Britannica, Inc, and Karen Jacobs Sparks. Encyclopaedia Britannica 2009 Book of the Year. Encyclopaedia Britannica, Inc, 2009.