Champion cotton gin, for ginning cotton, with or without previous picking from the bolls.
MLA
Company., Champion Gin. Champion Cotton Gin, for Ginning Cotton, with or without Previous Picking from the Bolls. H. L. Butler, , 1871. https://collections.library.yale.edu/catalog/16309693.
APA, 6th edition
Company., C. G. (1871). Champion cotton gin, for ginning cotton, with or without previous picking from the bolls. [Trade catalogs--Pennsylvania--Philadelphia]. H. L. Butler, . https://collections.library.yale.edu/catalog/16309693.