Society of Illustrators (New York, N.Y.), Weithas, A., & McConnell, G. (1981). Twenty years of award winners. Published for the Society of Illustrators by Hastings House.
Chicago Style (17th ed.) CitationSociety of Illustrators (New York, N.Y.), Art Weithas, and Gerald McConnell. Twenty Years of Award Winners. New York: Published for the Society of Illustrators by Hastings House, 1981.
MLA (9th ed.) CitationSociety of Illustrators (New York, N.Y.), et al. Twenty Years of Award Winners. Published for the Society of Illustrators by Hastings House, 1981.
Warning: These citations may not always be 100% accurate.