Sears, E. L., & Guptill, A. L. (1947). Pastel painting step by step ([1st ed.].). Watson-Guptill Publications.
Chicago Style (17th ed.) CitationSears, Elinor Lathrop, and Arthur L. Guptill. Pastel Painting Step by Step. [1st ed.]. New York: Watson-Guptill Publications, 1947.
MLA (9th ed.) CitationSears, Elinor Lathrop, and Arthur L. Guptill. Pastel Painting Step by Step. [1st ed.]. Watson-Guptill Publications, 1947.
Warning: These citations may not always be 100% accurate.