Cita APA

Preston, D. R., & Roger W. Shuy. (1988). Varieties of American English: Teacher's handbook. D.C.: U.S. Information Agency.

Citación estilo Chicago

Preston, Dennis R., y Roger W. Shuy. Varieties of American English: Teacher's Handbook. D.C.: U.S. Information Agency, 1988.

Cita MLA

Preston, Dennis R., y Roger W. Shuy. Varieties of American English: Teacher's Handbook. D.C.: U.S. Information Agency, 1988.