APA (7th ed.) Citation

Milliron, H. E. (1973). A monograph of the western hemisphere bumblebees (Hymenoptera: Apidae; Bombinae): III. The genus Pyrobombus, subgenus Cullumanobombus. Entomological Society of Canada.

Chicago Style (17th ed.) Citation

Milliron, Herbert Edwards. A Monograph of the Western Hemisphere Bumblebees (Hymenoptera: Apidae; Bombinae): III. The Genus Pyrobombus, Subgenus Cullumanobombus. Ottawa: Entomological Society of Canada, 1973.

MLA (9th ed.) Citation

Milliron, Herbert Edwards. A Monograph of the Western Hemisphere Bumblebees (Hymenoptera: Apidae; Bombinae): III. The Genus Pyrobombus, Subgenus Cullumanobombus. Entomological Society of Canada, 1973.