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Dyfyniad Arddull ChicagoSawyer, L A., and W H. Mitchell. The Liberty Ships: :the History of the Emergency Type Cargo Ships Constructed in the U S During World War Ii. Rev.ed.2. Newton: David and charles, 1973.
Dyfyniad MLASawyer, L A., and W H. Mitchell. The Liberty Ships: :the History of the Emergency Type Cargo Ships Constructed in the U S During World War Ii. Rev.ed.2. David and charles, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.