* Bezilla, Michael. ''Electric Traction on the Pennsylvania Railroad, 1895-1968.'' (1980). 233 pp.
* Bezilla, Michael. ''Electric Traction on the Pennsylvania Railroad, 1895-1968.'' (1980). 233 pp.
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* Chandler, Alfred D., Jr. "The Railroads: Pioneers in Modern Corporate Management". ''Business History Review'' 1965 39(1): 16-40. [http://www.jstor.org/stable/3112463 in JSTOR]
* Daughen, Joseph R., and Peter H. Binzen. ''The Wreck of the Penn Central'' (1971).
* Daughen, Joseph R., and Peter H. Binzen. ''The Wreck of the Penn Central'' (1971).
* Davis, Patricia T. ''End of the Line: Alexander J. Cassatt and the Pennsylvania Railroad.'' (1978). 208 pp.
* Davis, Patricia T. ''End of the Line: Alexander J. Cassatt and the Pennsylvania Railroad.'' (1978). 208 pp.