Gaya APA

Sagen, A., Mitchell, P. (2002). Safety and Health at Sea : A Practical Manual for Seafarers (Ed. 1). United Kingdom: Penerbit Witherby Seamanship International.

Gaya MLA

Sagen, Arne., Mitchell, Pat. "Safety and Health at Sea : A Practical Manual for Seafarers". Ed. 1 United Kingdom: Penerbit Witherby Seamanship International, 2002. Text.