By Zeithaml, Valarie A.. New York : McGraw-Hill Irwin, 2013 . xxvii, 642 p. : 26 cm.. 9780071086967 | 0078112052
]]>By Cateora, Philip R.. New York : McGraw-Hill Irwin, 2014 . xxxiii, 638 p. : , Includes references and indexes. 29 cm.. 9780077151690
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