Sowell, T. (1987). A conflict of visions (First Quill edition.). Quill.
Cita Chicago (17th ed.)Sowell, Thomas. A Conflict of Visions. First Quill edition. New York: Quill, 1987.
Cita MLA (8th ed.)Sowell, Thomas. A Conflict of Visions. First Quill edition. Quill, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.