Martin, Elma (22 December 1892). "Diary". Vassar College Digital Library. Poughkeepsie, New York, New York. p. 33. Archived from the original on 12 January 2018. Retrieved 12 January 2018.
Mansfield, Adelaide (12 November 1893). "Letter". Vassar College Digital Library. Poughkeepsie, New York, USA. p. 6. Retrieved 12 January 2018.
web.archive.org
Martin, Elma (22 December 1892). "Diary". Vassar College Digital Library. Poughkeepsie, New York, New York. p. 33. Archived from the original on 12 January 2018. Retrieved 12 January 2018.
worldwidewords.org
Quinion, Michael. "Fudge". World Wide Words. Retrieved 12 January 2018.