Opie, I. A. (1993). The people in the playground. Oxford University Press.
芝加哥风格引文Opie, Iona Archibald. The People in the Playground. Oxford: Oxford University Press, 1993.
MLA引文Opie, Iona Archibald. The People in the Playground. Oxford University Press, 1993.
警告:这些引文格式不一定是100%准确.