MLA

Haugen, Einar, J. Derrick McClure, and Derick Thomson. Minority Languages Today. ppb ed. with corrections and additions Edinburgh: Edinburgh University Press, 1990.

APA

Haugen, E., McClure, J. Derrick, & Thomson, D. (1990). Minority languages today. ppb ed. with corrections and additions Edinburgh: Edinburgh University Press.

Chicago

Haugen, Einar ed., J. Derrick McClure ed., and Derick Thomson ed. Minority Languages Today. ppb ed. with corrections and additions Edinburgh: Edinburgh University Press, 1990.