APA Citation

Gale (Firm). (2011). Countries of the world and their leaders yearbook 2012. Detroit, Mich.: Gale.

Chicago Style Citation

Gale (Firm). Countries of the World and Their Leaders Yearbook 2012. Detroit, Mich.: Gale, 2011.

MLA Citation

Gale (Firm). Countries of the World and Their Leaders Yearbook 2012. Detroit, Mich.: Gale, 2011.

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