Gaya APA

M.C.1.25. General Operator's Certificate for the Global Maritime Distress and Safety System, Course + Compendium. (2015). LONDON: IMO.

Gaya MLA

M.C.1.25. General Operator's Certificate for the Global Maritime Distress and Safety System, Course + Compendium. Revised ed 2015. LONDON: IMO, 2015. Text.