Williams, Roger (1827). A key into the language of America. Providence: John Miller. p. 110. Retrieved 2008-12-11. Reprint of a book first published in 1643.
John Pickering, A vocabulary or collection of words and phrases which have been supposed to be peculiar to the United States of America, "Squaw" (Pub. by Cummings and Hilliard, No. 1 Cornhill, 1816) pg. 180 books.google.com
Allan A. Metcalf, The world in so many words: a country-by-country tour of words that have shaped our language (Houghton Mifflin Harcourt, 1999)[1]