Book: Earnest, Russell D. & Earnest, Corinne P. 1997 Papers for Birth Dayes: Guide to the Fraktur Artists and Scriveners. 2 vols. 909.
• For more on Rudy, see pp. 656-658.Article: Wertkin, Gerald C. 1993 "The Watercolors of Durs Rudy: New Discoveries in Fraktur". Folk Art. 18 (2): 33-39.
• Published: p. 39.Catalogue: Garvan, Beatrice B. & Hummel, Charles F. 1982 The Pennsylvania Germans: a celebration of their arts, 1683-1850. An exhibition organized by the Philadelphia Museum of Art and the Henry Francis du Pont Winterthur Museum.
• Published: fig. 120 on p. 163.Article: Irving, Joan & Minardi, Lisa. 2011 The Changing Nature of Fraktur Studies. Antiques and Fine Art. 327-329.
• Published: figs. 1-6, pp. 327-329.Journal: Maine Antiques Digest.
• Published in December 2008, p. 17-C.Catalogue: Pook & Pook Inc., Downingtown PA (sales cat.).
• Published in September 26, 2008 catalogue, lot 199.Catalogue: Hollander, Stacy C., et al. 2001 American Radiance: The Ralph Esmerian Gift to the American Folk Art Museum.
• See pp. 246-249 for related example.Catalogue: Minardi, Lisa. 2015 A Colorful Folk: Pennsylvania Germans & the Art of Everyday Life.
• Published: fig. 8, p.10