Gatenby, E. V. (1962). A direct method english course, Book V. Longmans.
Chicagoスタイル(17版)引用形式Gatenby, E. V. A Direct Method English Course, Book V. London: Longmans, 1962.
MLA(9版)引用形式Gatenby, E. V. A Direct Method English Course, Book V. Longmans, 1962.
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