Krombein, K. V. (1969). Life history notes on some egyptian solitary wasps and bees and their associates, Hymenoptera: Aculeata. Smithsonian Institution.
Citazione stile Chigago Style (17a edizione)Krombein, Karl V. Life History Notes on Some Egyptian Solitary Wasps and Bees and Their Associates, Hymenoptera: Aculeata. Washington, D.C, USA: Smithsonian Institution, 1969.
Citatione MLA (9a ed.)Krombein, Karl V. Life History Notes on Some Egyptian Solitary Wasps and Bees and Their Associates, Hymenoptera: Aculeata. Smithsonian Institution, 1969.
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