Hornby, A. Oxford progressive english for adult Learners. Oxford University Press.
Chicagoスタイル(17版)引用形式Hornby, A.S. Oxford Progressive English for Adult Learners. London: Oxford University Press.
MLA(9版)引用形式Hornby, A.S. Oxford Progressive English for Adult Learners. Oxford University Press.
警告: この引用は必ずしも正確ではありません.