Harrison, M. (1995). Grammar spectrum: Pre-intermediate : with answers. New York: Oxford University Press.
シカゴスタイル引用形Harrison, Mark. Grammar Spectrum: Pre-intermediate : With Answers. New York: Oxford University Press, 1995.
MLA引用形式Harrison, Mark. Grammar Spectrum: Pre-intermediate : With Answers. New York: Oxford University Press, 1995.
警告: この引用は必ずしも正確ではありません.