(1927). Speaking fundamentals: The art of self expression. New York: De Bower.
Παραπομπή Chicago StyleSpeaking Fundamentals: The Art of Self Expression. New York: De Bower, 1927.
MLA引文Speaking Fundamentals: The Art of Self Expression. New York: De Bower, 1927.
警告：這些引文格式不一定是100％准確.