Estopace, E. E. (2001). Make way for world's first mobile instant messengers. Philippine Star.
芝加哥风格引文Estopace, Eden Enano. "Make Way for World's First Mobile Instant Messengers." Philippine Star 2001.
MLA引文Estopace, Eden Enano. "Make Way for World's First Mobile Instant Messengers." Philippine Star, 2001.
警告：这些引文格式不一定是100％准确.