Thomas (2001:27–28, 61–63) Thomas, Erik R. (2001), An acoustic analysis of vowel variation in New World English, Publication of the American Dialect Society, 85, Duke University Press for the American Dialect Society, ISSN0002-8207
Thomas (2001:27–28, 73–74) Thomas, Erik R. (2001), An acoustic analysis of vowel variation in New World English, Publication of the American Dialect Society, 85, Duke University Press for the American Dialect Society, ISSN0002-8207
