Her Majestys Stationary Office. (1972). Admiralty manual of seamanship. H M S O.
Dyfyniad Arddull ChicagoHer Majestys Stationary Office. Admiralty Manual of Seamanship. Birmingham: H M S O, 1972.
Dyfyniad MLAHer Majestys Stationary Office. Admiralty Manual of Seamanship. H M S O, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.