O'Hara, W. J. (1951). Mariner's gyro-navigation manual for masters, mates, marine engineers and potential ship's officers. Cornell Maritime Press.
Chicago Style (17th ed.) CitationO'Hara, Walter J. Mariner's Gyro-navigation Manual for Masters, Mates, Marine Engineers and Potential Ship's Officers. Cambridge, Md.: Cornell Maritime Press, 1951.
MLA (9th ed.) CitationO'Hara, Walter J. Mariner's Gyro-navigation Manual for Masters, Mates, Marine Engineers and Potential Ship's Officers. Cornell Maritime Press, 1951.
Warning: These citations may not always be 100% accurate.