APA (7th ed.) Citation

Krombein, K. V. (1981). Biosystematic studies of Ceylonese Wasps, XVIII: A monograph of the Philanthidae (Hymenoptera : Sphecoidea). Smithsonian Institution Press.

Chicago Style (17th ed.) Citation

Krombein, Karl V. Biosystematic Studies of Ceylonese Wasps, XVIII: A Monograph of the Philanthidae (Hymenoptera : Sphecoidea). Washington: Smithsonian Institution Press, 1981.

MLA (9th ed.) Citation

Krombein, Karl V. Biosystematic Studies of Ceylonese Wasps, XVIII: A Monograph of the Philanthidae (Hymenoptera : Sphecoidea). Smithsonian Institution Press, 1981.