Singh, R. (2003). American government and politics: A concise introduction. SAGE Publications.
Citazione stile Chigago Style (17a edizione)Singh, Robert. American Government and Politics: A Concise Introduction. London ; Thousand Oaks, Calif.: SAGE Publications, 2003.
Citatione MLA (9a ed.)Singh, Robert. American Government and Politics: A Concise Introduction. SAGE Publications, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.