O'Hara, W. J. (1951). Mariner's gyro - navigation manual for masters, mates, marine engineers and potential ship's officers. Cornell maritime press.
শিকাগো স্টাইলে সাইটেশনO'Hara, Walter J. Mariner's Gyro - Navigation Manual for Masters, Mates, Marine Engineers and Potential Ship's Officers. Cambridge: Cornell maritime press, 1951.
এমএলএ সাইটেশনO'Hara, Walter J. Mariner's Gyro - Navigation Manual for Masters, Mates, Marine Engineers and Potential Ship's Officers. Cornell maritime press, 1951.
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