Tham khảo 24 giờ

  1. ↑ See the Common Locale Data Repository for detailed data about the preferred date and time notations used across the world, as well the locale settings of major computer operating systems, and the article Date and time representation by country.
  2. ↑ International Standard ISO 8601: Data elements and interchange formats – Information interchange – Representation of dates and times. International Organization for Standardization, 3rd ed., 2004.
  3. ↑ Pickar, Gloria D.; Graham, Hope; Swart, Beth; Swedish, Margaret (2011). Dosage calculations (ấn bản 2). Toronto: Nelson Education. tr. 60. ISBN 9780176502591.