United States. Bureau of Entomology and Plant Quarantine. (1936). Berlese funnel for collecting smaller soil animals. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Berlese Funnel for Collecting Smaller Soil Animals. [Washington]: [s.n.], 1936.
MLA (9th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Berlese Funnel for Collecting Smaller Soil Animals. [s.n.], 1936.
Warning: These citations may not always be 100% accurate.