Cita APA (7a ed.)

Drewry Shipping Consultants. (1989). Tanker and bulk carrier operating costs survey. Drewry Shipping Consultants.

Cita Chicago Style (17a ed.)

Drewry Shipping Consultants. Tanker and Bulk Carrier Operating Costs Survey. London: Drewry Shipping Consultants, 1989.

Cita MLA (9a ed.)

Drewry Shipping Consultants. Tanker and Bulk Carrier Operating Costs Survey. Drewry Shipping Consultants, 1989.