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by American Psychological Association
by National Council for the Social Studies
by Rath, Tom; Conchie, Barry
by Liu, Yuehua; Yao, Tao-Chung; Bi, Nyan-Ping; et al.
by Coogan, Michael D.; Brettler, Marc Z.
by Wong, Harry K.
by Osterwalder, Alexander; Pigneur, Yves
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