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Dyfyniad Arddull ChicagoJohnson, Peter. Ocean Racing and Offshore Yachts. Ed.2. London: Nautial publishing, 1972.
Dyfyniad MLAJohnson, Peter. Ocean Racing and Offshore Yachts. Ed.2. Nautial publishing, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.