Boyd, G., & Pentland, C. Issues in global politics. Free Press.
Cita Chicago (17th ed.)Boyd, Gavin, i Charles Pentland. Issues in Global Politics. New York: Free Press.
Cita MLA (9th ed.)Boyd, Gavin, i Charles Pentland. Issues in Global Politics. Free Press.
Atenció: Aquestes cites poden no estar 100% correctes.