Gaya APA

Hensen, H. (2008). Tug Use in Port : A Practical Guide (Ed. 2 Rev. 1). United Kingdom: Penerbit The Nautical Institute.

Gaya MLA

Hensen, Henk. "Tug Use in Port : A Practical Guide". Ed. 2 Rev. 1 United Kingdom: Penerbit The Nautical Institute, 2008. Text.