DAFTAR REFERENSI. Babbie, Earl. (1992). The Practice of Social Research (6 th ed). California: Woolworth Inc

1 94 DAFTAR REFERENSI A. Buku Armistead, C.G., G. Clark. (1996). Customer Service and Support (Layanan dan Dukungan Kepada Pelanggan). Jakarta: PT Ele...
Author:  Suparman Hermawan

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