Wren P.C. High School English Grammar & Composition. S. Chand & Company Pvt Ltd.
芝加哥风格引文Wren P.C. High School English Grammar & Composition. New Delhi New Delhi: S. Chand & Company Pvt Ltd.
MLA引文Wren P.C. High School English Grammar & Composition. S. Chand & Company Pvt Ltd.
警告：这些引文格式不一定是100％准确.