Smithsonian Institution. (1933). Review of wasps of subfamily Pseninae of North America (Hymenoptern, Aculeata). [s.n.].
Chicago Style (17th ed.) CitationSmithsonian Institution. Review of Wasps of Subfamily Pseninae of North America (Hymenoptern, Aculeata). [Washington]: [s.n.], 1933.
MLA (9th ed.) CitationSmithsonian Institution. Review of Wasps of Subfamily Pseninae of North America (Hymenoptern, Aculeata). [s.n.], 1933.
Warning: These citations may not always be 100% accurate.