India Ministry of Shipping & Transport Directorate of Transport Research. (1971). Port transport statistics: 1970-71. Directorate of Transport Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndia Ministry of Shipping & Transport Directorate of Transport Research. Port Transport Statistics: 1970-71. Directorate of Transport Research, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIndia Ministry of Shipping & Transport Directorate of Transport Research. Port Transport Statistics: 1970-71. Directorate of Transport Research, 1971.
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