Herald, J. (2010). Prosperity on purpose. Allen & Unwin.
Cita Chicago (17th ed.)Herald, Justin. Prosperity on Purpose. Australia: Allen & Unwin, 2010.
Cita MLA (9th ed.)Herald, Justin. Prosperity on Purpose. Allen & Unwin, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.