DR RAO. N. D. V. PRASADA. (2012). LEARNER'S ENGLISH GRAMMAR AND COMPOSITION BOOK- 6. S.CHAND.
芝加哥风格引文DR RAO. N. D. V. PRASADA. LEARNER'S ENGLISH GRAMMAR AND COMPOSITION BOOK- 6. S.CHAND, 2012.
MLA引文DR RAO. N. D. V. PRASADA. LEARNER'S ENGLISH GRAMMAR AND COMPOSITION BOOK- 6. S.CHAND, 2012.
警告：这些引文格式不一定是100％准确.