Krombein, K. V. (1996). Biosystematic studies of Ceylonese wasps, XXI: A revision of the Bethylinae and Epyrinae (Cephalonomiini and Sclerodermini) (Hymenoptera:Bethylidae). Smithsonian Institution Press.
Chicago Style (17th ed.) CitationKrombein, Karl V. Biosystematic Studies of Ceylonese Wasps, XXI: A Revision of the Bethylinae and Epyrinae (Cephalonomiini and Sclerodermini) (Hymenoptera:Bethylidae). Washington, D.C.: Smithsonian Institution Press, 1996.
MLA (9th ed.) CitationKrombein, Karl V. Biosystematic Studies of Ceylonese Wasps, XXI: A Revision of the Bethylinae and Epyrinae (Cephalonomiini and Sclerodermini) (Hymenoptera:Bethylidae). Smithsonian Institution Press, 1996.
Warning: These citations may not always be 100% accurate.