Adler, H. A. (1973). Sector and project planning in transportation. International Bank for Reconstruction and Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAdler, Hans A. Sector and Project Planning in Transportation. International Bank for Reconstruction and Development, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAdler, Hans A. Sector and Project Planning in Transportation. International Bank for Reconstruction and Development, 1973.
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