"Naval Architecture for All". United States Bureau of Transportation Statistics. Diarsipkan dari asli tanggal 2008-10-10. Diakses tanggal October 13, 2008.{{cite web}}:
"Naval Architecture for All". United States Bureau of Transportation Statistics. Diarsipkan dari asli tanggal 2008-10-10. Diakses tanggal October 13, 2008.{{cite web}}: