Sandford, W. P., & Yeager, W. H. (1963). Principles of effective speaking (6th ed.). Ronald Press Co..
芝加哥风格引文Sandford, William Phillips, 与 Willard Hayes Yeager. Principles of Effective Speaking. 6th ed. New York: Ronald Press Co., 1963.
MLA引文Sandford, William Phillips, 与 Willard Hayes Yeager. Principles of Effective Speaking. 6th ed. Ronald Press Co., 1963.
警告：这些引文格式不一定是100％准确.