Wolfram, W. (1998). American English: Dialects and variation / Walt Wolfram y Natalie Schilling-Estes. Blackwell publishers.
Cita Chicago Style (17a ed.)Wolfram, Walt. American English: Dialects and Variation / Walt Wolfram Y Natalie Schilling-Estes. Massachusetts, Estados Unidos: Blackwell publishers, 1998.
Cita MLA (9a ed.)Wolfram, Walt. American English: Dialects and Variation / Walt Wolfram Y Natalie Schilling-Estes. Blackwell publishers, 1998.
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