Gaya APA
DeVrye, C. (1994).
Good Service is Good Business: 7 Strategi Sederhana Menuju Sukses .
Jakarta:
PT Gramedia Pustaka Utama.
Gaya MLA
DeVrye, Catherine.
"Good Service is Good Business: 7 Strategi Sederhana Menuju Sukses".
Jakarta:
PT Gramedia Pustaka Utama,
1994.
Text.