1. Aberdeen Kai-fong Association. (2012). Nan She Zhi Yin. Aberdeen Kai-fong Association, Hong Kong: The author. (In Chinese)
2. Agency for Volunteer Service. (2012). 2010–2011 annual report. Retrieved from
http://www.avs.org.hk/annual2011/avs_1011_contents_eng.html
3. Census and Statistics Department. (2003). Thematic household survey report – Report no. 14, pattern of participation in unpaid activities. Hong Kong, China: The Hong Kong SAR Government.
4. Census and Statistics Department. (2005). Thematic household survey report no. 21, socio-demographic profile, health status and long-term care needs of older persons. Hong Kong, China: The Hong Kong SAR Government.
5. Census and Statistics Department. (2009a). Socio-demographic profile, health status and self-care capability of older persons, thematic household survey report no. 40. Hong Kong, China: The Hong Kong SAR Government.