"New Jersey, Births, 1670-1980," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FCYP-J3L : 10 March 2018), Herbert A. Shaules in entry for Gertrude E. Shaules, 20 Apr 1900; citing Hoboken, Hudson, New Jersey, United States, Division of Archives and Record Management, New Jersey Department of State, Trenton.; FHL microfilm 494,244.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K97Z-7HM : 15 March 2018), Gertrude E Pence in household of Parker K Pence, Tract 567, Avalon, Catalina Judicial Township, Los Angeles, California, United States; citing enumeration district (ED) 19-71, sheet 4A, line 5, family 98, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 223.