Gaya APA

International, W, S. (2008). LNG Shipping Knowledge Underpinning Knowledge Underpinning Knowledge to the SIGTTO 2005 Standards Volume 6 . West Lothian: Witherby Seamanship International.

Gaya MLA

International, Witherby, Seamanship. "LNG Shipping Knowledge Underpinning Knowledge Underpinning Knowledge to the SIGTTO 2005 Standards Volume 6". West Lothian: Witherby Seamanship International, 2008. Text.