Gaya APA
DeVrye, C. (1997).
Good Service is Good Business : 7 Strategi Sederhana Menuju Sukses .
Jakarta:
RajaGrafindo Persada.
Gaya MLA
DeVrye, Catherine.
"Good Service is Good Business : 7 Strategi Sederhana Menuju Sukses".
Jakarta:
RajaGrafindo Persada,
1997.
Ekonomi/Fia.