- Byars, William Vincent, ed. B. and M. Gratz, Merchants in Philadelphia, 1754-1798 Papers of Interest to Their Posterity and the Posterity of Their Associate. . Jefferson City: Hugh Stephens Printing Co., 1916.
- Fish, Sidney M. Barnard and Michael Gratz: Their Lives and Times. . Lanham: University Press of America, 1994.
- Pencak, William. The Jews and Anti-Semitism in Early Pennsylvania. Pennsylvania Magazine of History and Biography. 126.3 (2002): 365-408.
- Wolf, Edwin and Maxwell Whiteman. The History of the Jews of Philadelphia from Colonial Times to the Age of Jackson. . Philadelphia: Jewish Publication Society, 1957.
- Gratz Family PapersAmerican Philosophical Society, Philadelphia, Pennsylvania [APS]
- Etting Collection, Gratz Correspondence, 1695-1780Historical Society of Pennsylvania, Philadelphia [HSP]
- McAllister Collection, Franks-Gratz-Simon PapersHistorical Society of Pennsylvania, Philadelphia [HSP]
- Henry Joseph PapersMS-451. American Jewish Archives, Cincinnati, Ohio