UNDERSTANDING SOCIAL PROBLEMS SECOND CANADIAN EDITION
2004 年出版540 页ISBN：0471456195
UNDERSTANDING HOSPITALITY ACCOUNTING I SECOND EDITION
RAYMOND COTE1991 年出版329 页ISBN：0866120629
UNDERSTANDING AMERICAN GOVERNMENT REVISED SECOND EDITION
MARIE D.NATOLI2005 年出版522 页ISBN：
UNDERSTANDING CONTEMPORARY LATIN AMERICA SECOND EDITION
RICHARD S.HILLMAN2001 年出版400 页ISBN：
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LINDA E.CARTER2008 年出版369 页ISBN：1422423867
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