Cite

Iowa : showing routes of proposed rail roads &c, 1852 / Cook & Sargent, Davenport, Cook, Sargent & Co., Dubuque.

MLA

Iowa : Showing Routes of Proposed Rail Roads &c, 1852 / Cook & Sargent, Davenport, Cook, Sargent & Co., Dubuque. Cook & Sargent? :, Cook Sargent & Co.?, 1852. https://collections.library.yale.edu/catalog/15814639.

APA, 6th edition

Iowa : showing routes of proposed rail roads &c, 1852 / Cook & Sargent, Davenport, Cook, Sargent & Co., Dubuque. (1852). [Maps]. Cook & Sargent? :, Cook Sargent & Co.?, https://collections.library.yale.edu/catalog/15814639.