Cunningham, Michael J.
Customer relationship management
Capstone, 2002
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Customer relationship management
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Buttle, francais
Customer relationship management: concepts and technologies
Elsevier/Butterworth-Heinemann, 2009
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Boy Subirosa Sabarguna
Aplikasi customer relationship management untuk rumah sakit
Sagung Seto, 2008
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Harvard business review on customer relationship management
Harvard Business School Publication, 2001
Buku Teks SO