Musper, H. T., Panofsky, E., & Schäffer, H. (1970). Dürer portraits: [letter of Erwin Panofsky to Hanns Schäffer, dated 6th April 1940]. The Burlington magazine, 112, pp. 826-827.
Chicago Style CitationMusper, Heinrich Th., Erwin Panofsky, and Hanns Schäffer. "Dürer Portraits: [letter of Erwin Panofsky to Hanns Schäffer, Dated 6th April 1940]." The Burlington Magazine 112 (1970): 826-827.
MLA CitationMusper, Heinrich Th., Erwin Panofsky, and Hanns Schäffer. "Dürer Portraits: [letter of Erwin Panofsky to Hanns Schäffer, Dated 6th April 1940]." The Burlington Magazine 112 (1970): 826-827.
Warning: These citations may not always be 100% accurate.