Tetley, L., & Calcutt, D. (1991). Electronic aids to navigation: Position fixing. London : Edward Arnold.
Cita Chicago (17th ed.)Tetley, L., i David Calcutt. Electronic Aids to Navigation: Position Fixing. London : Edward Arnold, 1991.
Cita MLA (9th ed.)Tetley, L., i David Calcutt. Electronic Aids to Navigation: Position Fixing. London : Edward Arnold, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.