Williams, Charles Frederic (1895), "Vessel", Merrill, John Houston; Williams, Charles Frederic; Michie, Thomas Johnson; Garland, David Shephard (Ed.), Utmost care to Watercourses, The American and English Encyclopædia of Law, 28, Edward Thompson Company, s. 440, 28 Temmuz 2020 tarihinde kaynağından arşivlendi, erişim tarihi: 16 Nisan 2022
With the addition of corvettes, this is the categorization used at United States Navy. "U.S. Navy Ships". United States Navy. 10 Nisan 2008 tarihinde kaynağından arşivlendi. Erişim tarihi: 20 Nisan 2008.
Williams, Charles Frederic (1895), "Vessel", Merrill, John Houston; Williams, Charles Frederic; Michie, Thomas Johnson; Garland, David Shephard (Ed.), Utmost care to Watercourses, The American and English Encyclopædia of Law, 28, Edward Thompson Company, s. 440, 28 Temmuz 2020 tarihinde kaynağından arşivlendi, erişim tarihi: 16 Nisan 2022
With the addition of corvettes, this is the categorization used at United States Navy. "U.S. Navy Ships". United States Navy. 10 Nisan 2008 tarihinde kaynağından arşivlendi. Erişim tarihi: 20 Nisan 2008.