Heppner, J. B., & Duckworth, D. W. (1981). Classification of the superfamily Sesioidea (Lepidopetera: Ditrepia). Smithsonian Institution Press.
Chicago Style (17th ed.) CitationHeppner, John B., and Donald W. Duckworth. Classification of the Superfamily Sesioidea (Lepidopetera: Ditrepia). Washington: Smithsonian Institution Press, 1981.
MLA (9th ed.) CitationHeppner, John B., and Donald W. Duckworth. Classification of the Superfamily Sesioidea (Lepidopetera: Ditrepia). Smithsonian Institution Press, 1981.
Warning: These citations may not always be 100% accurate.