304161 Williams, R. O., & Mixter, G. W. (1951). Navigation problems and solutions: Practical work, solutions, plotting, almanac data. New York : D. Van Nostrand.
Lua i Stíl Chicago (17ú heag.)304161 Williams, Ramon O., agus George Webber Mixter. Navigation Problems and Solutions: Practical Work, Solutions, Plotting, Almanac Data. New York : D. Van Nostrand, 1951.
Lua MLA (9ú heag.)304161 Williams, Ramon O., agus George Webber Mixter. Navigation Problems and Solutions: Practical Work, Solutions, Plotting, Almanac Data. New York : D. Van Nostrand, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.