Baccay, F. M. (2002). Business correspondence. MMA Publications.
芝加哥风格引文Baccay, Felicidad M. Business Correspondence. Quezon City: MMA Publications, 2002.
MLA引文Baccay, Felicidad M. Business Correspondence. MMA Publications, 2002.
警告：这些引文格式不一定是100％准确.