Παραπομπή APA

Drewry. Shipping Statistics and Economics. London: Drewry Shipping Consultants.

Παραπομπή Chicago Style

Drewry. Shipping Statistics and Economics. London: Drewry Shipping Consultants.

Παραπομπή MLA

Drewry. Shipping Statistics and Economics. London: Drewry Shipping Consultants.

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