Richards, J. C. (2013). Four corners: Student's book. Cambridge: Cambridge University Press.
シカゴスタイル引用形Richards, Jack C. Four Corners: Student's Book. Cambridge: Cambridge University Press, 2013.
MLA引用形式Richards, Jack C. Four Corners: Student's Book. Cambridge: Cambridge University Press, 2013.
警告: この引用は必ずしも正確ではありません.