Flesch, R. F. (1946). The art of plain talk. Harper.
Cita Chicago (17th ed.)Flesch, Rudolf Franz. The Art of Plain Talk. New York: Harper, 1946.
Cita MLA (9th ed.)Flesch, Rudolf Franz. The Art of Plain Talk. Harper, 1946.
Atenció: Aquestes cites poden no estar 100% correctes.