This primary source comes from the Records of the Bureau of Public Roads.
Full Citation: The making of the flag by Betsy Ross; 1777 (artwork ca. 1900); File Unit: Men, 1896 - 1963; Series: Historical Photograph Files, 1896 - 1963; Records of the Bureau of Public Roads, Record Group 30; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/making-of-the-flag-by-betsy-ross, April 29, 2024]