Gaya APA

, ., (Pengarang), , A. (2014). Quick Reference Resource for Important Navigation Chart Symbols Used on Ships (1). s.l. :: Marine Insight,.

Gaya MLA

, ., (Pengarang), , ASRUL. "Quick Reference Resource for Important Navigation Chart Symbols Used on Ships". 1 s.l. :: Marine Insight,, 2014. Sumber Elektronik.