Cita APA (7th ed.)
Spiegel, S. L. (1995). World politics in a new era. Harcourt Brace College Publishers.
Cita Chicago (17th ed.)
Spiegel, Steven L. World Politics in a New Era. Fort Worth: Harcourt Brace College Publishers, 1995.
Cita MLA (9th ed.)
Spiegel, Steven L. World Politics in a New Era. Harcourt Brace College Publishers, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.