1. The Journals and Papers of the Continental Congress;Friedenwald;Pennsylvania Magazine of History and Biography,1897
2. Dunlap and Claypoole: Printers and News-Merchants of the Revolution;Lee;Journalism Quarterly,1934
3. Press Freedom and the Public Printer: Pennsylvania 1775–1783;Teeter;Journalism Quarterly,1968
4. Discussions of Claypoole and Dunlap's activities as congressional printers may be found in Friedenwald, “The Journals and Papers of the Continental Congress,” pp. 177–180, 183–184, 362–371;