Tetley, L., & Calcutt, D. (1991). Electronic aids to navigation: Position fixing. London : Edward Arnold.
Dyfyniad Arddull ChicagoTetley, L., and David Calcutt. Electronic Aids to Navigation: Position Fixing. London : Edward Arnold, 1991.
Dyfyniad MLATetley, L., and David Calcutt. Electronic Aids to Navigation: Position Fixing. London : Edward Arnold, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.