"New Jersey, State Census, 1905," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KMWM-4LV : accessed 04 May 2014), Opeke Bounema in household of Wietze Bounema, , Bergen, New Jersey, United States; citing p. 23, line 14, Department of State, Trenton; FHL microfilm 1688588.
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M4P2-M5Q : accessed 04 May 2014), Barney Bonnema in household of Wietze Bonnema, Garfield Ward 3, Bergen, New Jersey, United States; citing sheet 8A, family 155, NARA microfilm publication T625, FHL microfilm 1821018.