Gray David E. (2009). Doing Research in the Real World (2nd.). Sage Pub.
芝加哥风格引文Gray David E. Doing Research in the Real World. 2nd. London: Sage Pub, 2009.
MLA引文Gray David E. Doing Research in the Real World. 2nd. Sage Pub, 2009.
警告：这些引文格式不一定是100％准确.