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- [S5690] Gwenn F. Epperson, "Jacob Hellekers alias Swart and Some of His Descendants." New York Genealogical and Biographical Record 121:76, 121:167, 1990.
- [S5695] Memoirs of the Life of David Rittenhouse, LLD. F.R.S. Late President of the American Philosophical Society, &c. by William Barton. Philadelphia: Edward Parker, 1813.
- [S5696] A Genea-Biographical History of the Rittenhouse Family and All its Branches in America by Daniel K. Cassel. Volume 1. Philadelphia: The Rittenhouse Memorial Association, 1893.
- [S5697] The Dewees Family: Genealogical Data, Biographical Facts, and Historical Information by Mrs. Philip E. LaMunyan. Ed. Ellwood Roberts. Norristown, Pennsylvania: William H. Roberts, 1905.
- [S5698] The Henckel genealogy, 1500-1960: Ancestry and Sescendants of Reverend Anthony Jacob Henckel, 1668-1728 by William Sumner Junkin. Spokane, Washington: Henckel Family Association, 1964.
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