O Brien, D. (2001). Derek O`Brien`s book of 1500 questions. Rila O Brien.
芝加哥风格引文O Brien, Derek. Derek O`Brien`s Book of 1500 Questions. Kolkata: Rila O Brien, 2001.
MLA引文O Brien, Derek. Derek O`Brien`s Book of 1500 Questions. Rila O Brien, 2001.
警告：这些引文格式不一定是100％准确.