Gaya APA

International, W, S. (2010). COLREGS Pocket Book (Ed. 1). United Kingdom: Penerbit Witherby Seamanship International.

Gaya MLA

International, Witherby, Seamanship. "COLREGS Pocket Book". Ed. 1 United Kingdom: Penerbit Witherby Seamanship International, 2010. Text.