KIRBY, R. S. The Atlas of North American English: Phonetics, Phonology and Sound Change. A Multimedia Reference Tool. Cartographic Perspectives, [S. l.], n. 57, p. 63–64, 2007. DOI: 10.14714/CP57.284. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp57-kirby. Acesso em: 18 jan. 2022.