Leedy, P. D., & Ormrod, J. E. Practical research: Planning and design (Eleventh edition.).
シカゴスタイル引用形Leedy, Paul D., , Jeanne Ellis Ormrod. Practical Research: Planning and Design. Eleventh edition.
MLA引用形式Leedy, Paul D., , Jeanne Ellis Ormrod. Practical Research: Planning and Design. Eleventh edition.
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