Flesch, R. F. (1960). How to write, speak and think more effectively. New York: New American Library.
استشهاد بنمط شيكاغوFlesch, Rudolf Franz. How to Write, Speak and Think More Effectively. New York: New American Library, 1960.
MLA استشهادFlesch, Rudolf Franz. How to Write, Speak and Think More Effectively. New York: New American Library, 1960.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.