Cita APA (7a ed.)

Ritherdon, R. (1923). Dues and port charges on shipping throughout the world: A manual of reference for the use of shipowners, shipbrokers, and shipmasters (17th ed.). George Philip & Son.

Cita Chicago Style (17a ed.)

Ritherdon, Robert. Dues and Port Charges on Shipping Throughout the World: A Manual of Reference for the Use of Shipowners, Shipbrokers, and Shipmasters. 17th ed. London: George Philip & Son, 1923.

Cita MLA (9a ed.)

Ritherdon, Robert. Dues and Port Charges on Shipping Throughout the World: A Manual of Reference for the Use of Shipowners, Shipbrokers, and Shipmasters. 17th ed. George Philip & Son, 1923.