Cyssco, d. r. (2000). English grammar practice for toefl: Persiapan tes. Puspa Swara.
芝加哥风格引文Cyssco, dhanny r. English Grammar Practice for Toefl: Persiapan Tes. Puspa Swara, 2000.
MLA引文Cyssco, dhanny r. English Grammar Practice for Toefl: Persiapan Tes. Puspa Swara, 2000.
警告：这些引文格式不一定是100％准确.