APA

Field W. D., Dos Passos C. F. & Masters J. H. (1974). A bibliography of the catalogs, lists, faunal and other papers on the butterflies of North America North of Mexico arranged by state and province (Lepidoptera: Rhopalocera). Washington, DC: Smithsonian Inst. Press.

Chicago

Field William D, Dos Passos Cyril F and Masters John H. 1974. A bibliography of the catalogs, lists, faunal and other papers on the butterflies of North America North of Mexico arranged by state and province (Lepidoptera: Rhopalocera). Washington, DC: Smithsonian Inst. Press.

Harvard

Field W. D., Dos Passos C. F. and Masters J. H. (1974). A bibliography of the catalogs, lists, faunal and other papers on the butterflies of North America North of Mexico arranged by state and province (Lepidoptera: Rhopalocera). Washington, DC: Smithsonian Inst. Press.

MLA

Field William D, Dos Passos Cyril F and Masters John H. A bibliography of the catalogs, lists, faunal and other papers on the butterflies of North America North of Mexico arranged by state and province (Lepidoptera: Rhopalocera). Washington, DC: Smithsonian Inst. Press. 1974.