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Tuckman, Bruce W., Harper, Brian E.. (2012). Conducting Educational Research (Six). London: Rowman & Littlefield Publishers, Inc..

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Tuckman, Bruce W., Harper, Brian E.. Conducting Educational Research. Six London: Rowman & Littlefield Publishers, Inc., 2012. Text.

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Tuckman, Bruce W., Harper, Brian E.. Conducting Educational Research. Six London: Rowman & Littlefield Publishers, Inc., 2012. Text.

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Tuckman, Bruce W., Harper, Brian E.. Conducting Educational Research. Six London: Rowman & Littlefield Publishers, Inc., 2012. Print.