MLA

Frederiksen, and Co. Frederiksen & Co. Own and Offer for Sale in Central Kansas : 150,000 Acres of the Choicest Farming Lands ... (Poole Bros. printers and engravers), [Frederiksen & Co.], 0AD. https://collections.library.yale.edu/catalog/2052765.

APA, 6th edition

F., & C. (0 C.E.). Frederiksen & Co. own and offer for sale in central Kansas : 150,000 acres of the choicest farming lands ... [Advertisements, Maps, Pamphlets, Promotional literature]. (Poole Bros. printers and engravers), [Frederiksen & Co.]. https://collections.library.yale.edu/catalog/2052765.