This primary source comes from the Records of the War Department General and Special Staffs, 1860 - 1952.
Full Citation: Photograph 165-WW-34B-18; American Red Cross - In the Service of Interior - Canteen Service - Red Cross, Williamsport, PA. Exterior of Red Cross Canteen; 1917-1918; American Red Cross - In the Service of Interior - Canteen Service; American Unofficial Collection of World War I Photographs, 1917 - 1918; Records of the War Department General and Special Staffs, 1860 - 1952, Record Group 165; National Archives at College Park, College Park, MD. [Online Version, https://docsteach.org/documents/document/canteen-service-red-cross-williamsport-pa, April 18, 2024]