Romero, P. P. (1997). Principles of speech and oral communication. Katha.
芝加哥风格引文Romero, Perlita P. Principles of Speech and Oral Communication. Quezon City: Katha, 1997.
MLA引文Romero, Perlita P. Principles of Speech and Oral Communication. Katha, 1997.
警告：这些引文格式不一定是100％准确.