Παραπομπή APA

Institute of Shipping Economics. (1977). Shipping statistics yearbook 1977: Facts and figures about shipping, shipbuilding, seaports and sea born trade. Bremen: Institute of Shipping Economics.

Παραπομπή Chicago Style

Institute of Shipping Economics. Shipping Statistics Yearbook 1977: Facts and Figures About Shipping, Shipbuilding, Seaports and Sea Born Trade. Bremen: Institute of Shipping Economics, 1977.

Παραπομπή MLA

Institute of Shipping Economics. Shipping Statistics Yearbook 1977: Facts and Figures About Shipping, Shipbuilding, Seaports and Sea Born Trade. Bremen: Institute of Shipping Economics, 1977.

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