APA (7th ed.) Citation

Jansen, S., & Spadafora Vincent G. (2007). The World almanac and book of facts 2007. A WRC media company.

Chicago Style (17th ed.) Citation

Jansen, Sarah, and Spadafora Vincent G. The World Almanac and Book of Facts 2007. New York: A WRC media company, 2007.

MLA (9th ed.) Citation

Jansen, Sarah, and Spadafora Vincent G. The World Almanac and Book of Facts 2007. A WRC media company, 2007.