Middleton, P. H. (1937). Railways of thirty nations: Government versus private ownership. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMiddleton, Philip H. Railways of Thirty Nations: Government Versus Private Ownership. New York: Prentice-Hall, 1937.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMiddleton, Philip H. Railways of Thirty Nations: Government Versus Private Ownership. Prentice-Hall, 1937.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.