APA

Janssen S., . (2014). The world almanac and book of facts 2014. New York: World Almanac Books.

Chicago

Janssen Sarah, . 2014. The world almanac and book of facts 2014. New York: World Almanac Books.

Harvard

Janssen S., . (2014). The world almanac and book of facts 2014. New York: World Almanac Books.

MLA

Janssen Sarah, . The world almanac and book of facts 2014. New York: World Almanac Books. 2014.