APA (7th ed.) Zitazioa

Gubbins, E. J. (1986). The shipping industry: The technology and economics of specialisation. Gordon and Breach Science Publishers.

Chicago Style (17th ed.) Zitazioa

Gubbins, Edmund J. The Shipping Industry: The Technology and Economics of Specialisation. Nueva York: Gordon and Breach Science Publishers, 1986.

MLA (9th ed.) Zitazioa

Gubbins, Edmund J. The Shipping Industry: The Technology and Economics of Specialisation. Gordon and Breach Science Publishers, 1986.