Gumpol, W. (2002). Mastery of Sixteen Tenses/ W.Y. Gumpol. Yogyakarta: Kanisius.
Chicago Style (17th ed.) CitationGumpol, W.Y. Mastery of Sixteen Tenses/ W.Y. Gumpol. Yogyakarta: Kanisius, 2002.
MLA引文Gumpol, W.Y. Mastery of Sixteen Tenses/ W.Y. Gumpol. Yogyakarta: Kanisius, 2002.
警告：這些引文格式不一定是100％准確.