Hensen, H. (1997). Tug use in port: A practical guide covering tug types, performance, shiphandling, safety, training and escort operations. The Nautical Institute.
Chicago Style (17th ed.) CitationHensen, Henk. Tug Use in Port: A Practical Guide Covering Tug Types, Performance, Shiphandling, Safety, Training and Escort Operations. London, England: The Nautical Institute, 1997.
MLA (9th ed.) CitationHensen, Henk. Tug Use in Port: A Practical Guide Covering Tug Types, Performance, Shiphandling, Safety, Training and Escort Operations. The Nautical Institute, 1997.
Warning: These citations may not always be 100% accurate.