APA (7th ed.) Citation

Witherby Seamanship International. (2015). 21st century seamanship (First edition.). Witherby Seamanship International, a division of Witherby Publishing Group Ltd.

Chicago Style (17th ed.) Citation

Witherby Seamanship International. 21st Century Seamanship. First edition. Edinburgh, Scotland: Witherby Seamanship International, a division of Witherby Publishing Group Ltd, 2015.

MLA (9th ed.) Citation

Witherby Seamanship International. 21st Century Seamanship. First edition. Witherby Seamanship International, a division of Witherby Publishing Group Ltd, 2015.