Cita APA (7a ed.)

Haugen, E. I. (1973). Bilingualism, language contact, and immigrant languages in the United States: A research report 1956-1970. [s.n.].

Cita Chicago Style (17a ed.)

Haugen, Einar Ingvald. Bilingualism, Language Contact, and Immigrant Languages in the United States: A Research Report 1956-1970. [S.l.]: [s.n.], 1973.

Cita MLA (9a ed.)

Haugen, Einar Ingvald. Bilingualism, Language Contact, and Immigrant Languages in the United States: A Research Report 1956-1970. [s.n.], 1973.