Flesch, R. F. (1972). Say what you mean. Harper & Row.
Cita Chicago (17th ed.)Flesch, Rudolf F. Say What You Mean. New York: Harper & Row, 1972.
Cita MLA (9th ed.)Flesch, Rudolf F. Say What You Mean. Harper & Row, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.