Snow, Catherine E.; Hakuta, Kenji (1992). "The Costs of Monolingualism"(PDF). In Crawford, J. (ed.). Language Loyalties: A Source Book on the Official English Controversy. The University of Chicago. pp. 384–394. Retrieved 9 March 2012.
Snow, Catherine E.; Hakuta, Kenji (1992). "The Costs of Monolingualism"(PDF). In Crawford, J. (ed.). Language Loyalties: A Source Book on the Official English Controversy. The University of Chicago. pp. 384–394. Retrieved 9 March 2012.
Snow, Catherine E.; Hakuta, Kenji (1992). "The Costs of Monolingualism"(PDF). In Crawford, J. (ed.). Language Loyalties: A Source Book on the Official English Controversy. The University of Chicago. pp. 384–394. Retrieved 9 March 2012.
Snow, Catherine E.; Hakuta, Kenji (1992). "The Costs of Monolingualism"(PDF). In Crawford, J. (ed.). Language Loyalties: A Source Book on the Official English Controversy. The University of Chicago. pp. 384–394. Retrieved 9 March 2012.
