Lovelock, Christopher H.
Product plus : how product + service = competitive advantage
McGraw-Hill, 1994
 Buku Teks
Brown, Stanley A.
Total Quality Service: how organization use it to create a competitive advantage
Prentice-Hall, 1992
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Porter, Michael E.
The competitive advantage of nations
The Free Press , 1990
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Bendell, Tony
Benchmarking for competitive advantage
Elex Media Komputindo, 2000
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Bendell, Tony
Benchmarking for competitive advantage
Elex Media Komputindo, 2000
 Buku Teks