UNDERSTANDING BUSINESS STATISTICS SECOND EDITION
MASSACHUSETTS SYENEY1994 年出版0 页ISBN：
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ROBERT H.JERRY AND DOUGLAS R.RICHMOND2007 年出版1024 页ISBN：1422417468
Understanding the law sixth edition
Donald L.Carper and john A.mckinsey2012 年出版793 页ISBN：0538473592
Understanding Child Development Second Edition
Rosalind Charlesworth1987 年出版610 页ISBN：0827327862
UNDERSTANDING RESEARCH METHODS SECOND EDITION
MILDRED L.PATTEN2000 年出版138 页ISBN：
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SANDRA M.STEVENSON2009 年出版241 页ISBN：1422473317
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