Helen Dwight Reid Educational Foundation. (1990). Perspectives on political science. Heldref Publications.
Citação do estilo Chicago (17ª ed.)Helen Dwight Reid Educational Foundation. Perspectives on Political Science. Washington: Heldref Publications, 1990.
Citação MLA (8ª ed.)Helen Dwight Reid Educational Foundation. Perspectives on Political Science. Heldref Publications, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.