APA (7th ed.) Citation

Janssen, S. (2016). The world almanac and book of facts 2016. World Almanac Books.

Chicago Style (17th ed.) Citation

Janssen, Sarah. The World Almanac and Book of Facts 2016. New York: World Almanac Books, 2016.

MLA (9th ed.) Citation

Janssen, Sarah. The World Almanac and Book of Facts 2016. World Almanac Books, 2016.