Fowler, W. S., Pidcock, J., & Yorkey, R. C. Incentive themes. Book 4, teacher´s edition.
Chicagoスタイル(17版)引用形式Fowler, W. S., J. Pidcock, , Richard C. Yorkey. Incentive Themes. Book 4, Teacher´s Edition.
MLA(8版)引用形式Fowler, W. S., et al. Incentive Themes. Book 4, Teacher´s Edition.
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