Παραπομπή APA

Institute of Shipping Economics. (1979). Shipping statistics yearbook 1979: Facts and figures about shipping, shipbuilding, seaports and sea-borne trade. Bremen: Institute of Shipping Economics.

Παραπομπή Chicago Style

Institute of Shipping Economics. Shipping Statistics Yearbook 1979: Facts and Figures About Shipping, Shipbuilding, Seaports and Sea-borne Trade. Bremen: Institute of Shipping Economics, 1979.

Παραπομπή MLA

Institute of Shipping Economics. Shipping Statistics Yearbook 1979: Facts and Figures About Shipping, Shipbuilding, Seaports and Sea-borne Trade. Bremen: Institute of Shipping Economics, 1979.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.