WOSHINSKY, Oliver H. Explaining Politics: Culture, Institutions, and Political Behavior. New York: Routledge, 2008. Dostupné online. S. 143.
WOSHINSKY, Oliver H. Explaining Politics: Culture, Institutions, and Political Behavior. Oxon, England, UK; New York, New York, USA: Routledge, 2008. Dostupné online. ISBN978-0203933183. S. 145–149. (angličtina)