Tham khảo Xmas

  1. ↑ Catholic Encyclopedia: Liturgy of the Mass. Retrieved 20 December 2007.
  2. ↑ Siegel, Allan M. and William G. Connolly, The New York Times Manual of Style and Usage, Three Rivers Press, 1999, ISBN 978-0-8129-6389-2, pp 66, 365, retrieved via Google Books, December 27, 2008
  3. ↑ Griffiths, Emma, "Why get cross about Xmas?", BBC website, December 22, 2004. Retrieved December 28, 2008.
  4. ↑ Fenwick, Millicent, Vogue's Book of Etiquette: A Complete Guide to Traditional Forms and Modern Usage, Simon and Schuster, 1948, p 611, retrieved via Google Books, December 27, 2008; full quote seen on Google Books search page
  5. ↑ Peters, Pam, "Xmas" article, The Cambridge Guide to Australian English Usage, Cambridge University Press, 2007, ISBN 978-0-521-87821-0, p 872, retrieved via Google Books, December 27, 2008
  6. ↑ Hudson, Robert, "Xmas" article, The Christian Writer's Manual of Style: Updated and Expanded Edition, Zondervan, 2004, ISBN 978-0-310-48771-5 p 412, retrieved via Google Books, December 27, 2008