APA-referens (7:e uppl.)
Zhang, T. (2008). Elderly entrepreneurship in an aging US economy: It's never too late. World Scientific Pub..
Chicago-referens (17:e uppl.)
Zhang, Ting. Elderly Entrepreneurship in an Aging US Economy: It's Never Too Late. Singapore ; Hackensack, NJ: World Scientific Pub., 2008.
MLA-referens (9:e uppl.)
Zhang, Ting. Elderly Entrepreneurship in an Aging US Economy: It's Never Too Late. World Scientific Pub., 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.