Gaya APA

(ISL), I, O, S, E, A, L. (1990). Shipping statistics yearbook 1990 . Germany: review of recent technological development in the land air and maritime transport sectors.

Gaya MLA

(ISL), Institute, Of, Shipping, Economics, And, Logistics. "Shipping statistics yearbook 1990". Germany: review of recent technological development in the land air and maritime transport sectors, 1990. REF.