Article: Evans, Nancy Goyne. 02//1973 Documented Fraktur in the Winterthur collection, Part I. Antiques. 103 (2): 307-18.
• Published as fig. 4, pp. 308-9.Book: Earnest, Russell D. & Earnest, Corinne P. 2005 Flying Leaves and One-Sheets: Pennsylvania German Broadsides, Fraktur, and Their Printers.
• For other examples of spiritual mazes, see pp. 280-285.Book: Yoder, Don. 2005 The Pennsylvania German Broadside: A History and Guide.
• For other examples of spiritual mazes, see pp. 181-183.Book: Shelley, Donald A. 1961 The Fraktur-Writings or Illuminated Manuscripts of the Pennsylvania Germans. 23.
• For related examples, see p. 124, 142 and pl. 189.Book: Bird, Michael S. 2002 O Noble Heart: Fraktur and Spirituality in Pennsylvania German Folk Art.
• Published as fig. 107, on p. 110.