^Holt, Kerin (2012). "Chapter 9: Here, There, and Everywhere: The Elusive Regionalism of John Neal". In Watts, Edward; Carlson, David J. (eds.). John Neal and Nineteenth Century American Literature and Culture. Lewisburg, Pennsylvania: Bucknell University Press. p. 185. ISBN 9781611484205.
^Biographical Dictionary of Civil Engineers, p. 224, at Google Books