-. The nautical almanac for the year 1961. Goverment Printing Office.
Chicago Style (17th ed.) Citation-. The Nautical Almanac for the Year 1961. Goverment Printing Office.
MLA (8th ed.) Citation-. The Nautical Almanac for the Year 1961. Goverment Printing Office.
Warning: These citations may not always be 100% accurate.