(1977). Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics. Bremen, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रShipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics. 1977.
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