APA (7th ed.) Zitazioa

Draffin, N. (2010). An introduction to bunker operations. Petrospot Ltd..

Chicago Style (17th ed.) Zitazioa

Draffin, Nigel. An Introduction to Bunker Operations. Adderbury, Oxfordshire, England: Petrospot Ltd., 2010.

MLA (9th ed.) Zitazioa

Draffin, Nigel. An Introduction to Bunker Operations. Petrospot Ltd., 2010.