Map of the Pennsylvania System of Railroads and their connections / issued by Passenger Department, Pennsylvania Lines, Pittsburgh, Pa.
MLA
Map of the Pennsylvania System of Railroads and Their Connections / Issued by Passenger Department, Pennsylvania Lines, Pittsburgh, Pa. [printed by] Rand McNally & Co., 0AD. https://collections.library.yale.edu/catalog/15827800.
APA, 6th edition
Map of the Pennsylvania System of Railroads and their connections / issued by Passenger Department, Pennsylvania Lines, Pittsburgh, Pa. (0 C.E.). [Maps]. [printed by] Rand McNally & Co., https://collections.library.yale.edu/catalog/15827800.
