Association of American Railroads. Railroad Committee for the Study of Transportation. (1941). Report on coordination. s.n..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAssociation of American Railroads. Railroad Committee for the Study of Transportation. Report on Coordination. [S.l.: s.n., 1941.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAssociation of American Railroads. Railroad Committee for the Study of Transportation. Report on Coordination. s.n., 1941.
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