^"Massachusetts, Boston Passenger Lists, 1891-1943," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:23XG-W15 : 4 December 2014), Ronald Spiers, 1924; citing Immigration, Boston, Suffolk, Massachusetts, United States, NARA microfilm publication T843 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,404,420. نسخة محفوظة 2020-08-23 على موقع واي باك مشين.
^"Ronald C Speirs". United States Social Security Death Index (FamilySearch Historical Records). مؤرشف من الأصل في 2016-03-22. اطلع عليه بتاريخ 2016-03-16.