Gaya APA

International, W, S. (2010). OOW : MSE Pocket Book (Ed. 1). United Kingdom: Penerbit Witherby Publishing Group.

Gaya MLA

International, Witherby, Seamanship. "OOW : MSE Pocket Book". Ed. 1 United Kingdom: Penerbit Witherby Publishing Group, 2010. Text.