APA (7th ed.) Citation

Campbell, G. L. (1991). Compendium of the world's languages / George L. Campbell. Routledge.

Chicago Style (17th ed.) Citation

Campbell, George L. Compendium of the World's Languages / George L. Campbell. London: Routledge, 1991.

MLA (9th ed.) Citation

Campbell, George L. Compendium of the World's Languages / George L. Campbell. Routledge, 1991.

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