"Michigan, Marriages, 1868-1925," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/NQ9C-FX6 : accessed 14 February 2015), John Wyngarden and Gertrude Van Sytzema, 19 May 1922; citing Zeeland, Ottawa, Michigan, v 6 rn 143, Department of Vital Records, Lansing; FHL microfilm 2,342,751.