(原始内容 (abstract)存档于2019-08-04). I. Ribas, C. Jordi, F. Vilardell, E. L. Fitzpatrick, R. W. Hilditch, E. F. Guinan. First Determination of the Distance and
Dialects and Variation. Wiley-Blackwell. 1998. ISBN 978-0-631-20487-9. Fitzpatrick, Jim. Beantown Babble (Boston, MA). W. Wolfram; B. Ward (编). American