Skidmore, M. J., & Tripp, M. C. (1977). American government: A brief introduction (Second edition.). St. Martin's Press.
Citazione stile Chigago Style (17a edizione)Skidmore, Max J., e Marshall Carter Tripp. American Government: A Brief Introduction. Second edition. New York: St. Martin's Press, 1977.
Citatione MLA (9a ed.)Skidmore, Max J., e Marshall Carter Tripp. American Government: A Brief Introduction. Second edition. St. Martin's Press, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.