United States. Bureau of Entomology and Plant Quarantine. (1943). Fleas of North America, classification, identification, and geographic distribution of these injurious and disease-spreading insects. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Fleas of North America, Classification, Identification, and Geographic Distribution of These Injurious and Disease-spreading Insects. [Washington]: [s.n.], 1943.
MLA (9th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Fleas of North America, Classification, Identification, and Geographic Distribution of These Injurious and Disease-spreading Insects. [s.n.], 1943.
Warning: These citations may not always be 100% accurate.