APA (7th ed.) Citation

Encyclopedia Britannica. (2009). Time almanac 2009. Encyclopedia Britannica.

Chicago Style (17th ed.) Citation

Encyclopedia Britannica. Time Almanac 2009. Chicago: Encyclopedia Britannica, 2009.

MLA (9th ed.) Citation

Encyclopedia Britannica. Time Almanac 2009. Encyclopedia Britannica, 2009.

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