Ripper, H. J. (1938). Vital speech: A study in perfect utterance. Methuen & Co., Ltd..
芝加哥风格引文Ripper, Harold J. Vital Speech: A Study in Perfect Utterance. London: Methuen & Co., Ltd., 1938.
MLA引文Ripper, Harold J. Vital Speech: A Study in Perfect Utterance. Methuen & Co., Ltd., 1938.
警告：这些引文格式不一定是100％准确.