Gaya APA
Haryono, B.
(2016).
How to win customer through customer service with heart
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Yogyakarta:
Andi Yogyakarta.
Gaya MLA
Haryono, Budi.
"How to win customer through customer service with heart".
Yogyakarta:
Andi Yogyakarta,
2016.
Buku.