Narratives of Early Pennsylvania, West New Jersey, and Delaware, 1630–1707. New York: Charles Scribner's Sons Ward, Christopher (1930) Dutch and Swedes on the
national map of the regional dialects of American English, Department of Linguistics, University of Pennsylvania, 1997 [May 27, 2013], (原始内容存档于2005-12-23) Sailaja
National Map of the Regional Dialects of American English. Department of Linguistics, University of Pennsylvania. 15 July 1997 [March 7, 2013]. (原始内容存档于2005-12-23)