Reni Agustin P., S. (2008). Let's Understand English. Era Pustaka Utama.
Chicago Style CitationReni Agustin P., S.Pd. Let's Understand English. Era Pustaka Utama, 2008.
MLA引文Reni Agustin P., S.Pd. Let's Understand English. Era Pustaka Utama, 2008.
警告：這些引文格式不一定是100％准確.