Crystal, D. (1997). English as a global language. Cambridge, England: Cambridge University Press.
シカゴスタイル引用形Crystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
MLA引用形式Crystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
警告: この引用は必ずしも正確ではありません.