Tham khảo Hài lòng

  1. ↑ Eisenblatt, S (2002). The Straight Road to Happiness: A Personal Guide to Enable Us to Overcome Tendencies which Block Our Natural Flow of Happiness and to Explore New Horizons of Inner Joy. tr. 292. 
  2. ↑ Hebrews 13:5; Keep your lives free from the love of money and be content with what you have, because God has said,"Never will I leave you;never will I forsake you."#:5 Deut. 31:6. www.bible.com. 
  3. ↑ “Neo-Taoism”. A Source Book in Chinese Philosophy. Princeton University Press. 2008. tr. 331. ISBN 978-1-4008-2003-0.  Đã bỏ qua tham số không rõ |translator-last= (trợ giúp)