Edward J. (Edward James) Reed, Edward Simpson e J. D. Jerrold (James Douglas Jerrold) Kelley, Modern ships of war, New York : Harper & Brothers, 1888, p. 15. URL consultato il 27 ottobre 2020.
Edward J. (Edward James) Reed, Edward Simpson e J. D. Jerrold (James Douglas Jerrold) Kelley, Modern ships of war, New York : Harper & Brothers, 1888, p. 2. URL consultato il 27 ottobre 2020.