(1977). Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics. Bremen, 1977.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics. 1977.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.