MLA

Land, Federal, and Securities Co. Golden Prairie Wyoming Lands for Sale by the Federal Land & Securities Company : Circular No. 21. Federal Land and Securities Co.?, 1908. https://collections.library.yale.edu/catalog/10256890.

APA, 6th edition

Land, F., & Co, S. (1908). Golden prairie Wyoming lands for sale by the Federal Land & Securities Company : circular no. 21. [Broadsides, Photomechanical prints, plats (maps) (AAT), Promotional literature]. Federal Land and Securities Co.?, https://collections.library.yale.edu/catalog/10256890.