Ralph K. Andrist (2015). The Gold Rush. New Word City. p. 29.
doi.org
Reeves, Keir; Frost, Lionel; Fahey, Charles (2010). "Integrating the Historiography of the Nineteenth-Century Gold Rushes". Australian Economic History Review. 50 (2): 111. doi:10.1111/j.1467-8446.2010.00296.x.