DeVrye, C. (1997). Good service is good business: 7 strategi sederhana menuju sukses. Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationDeVrye, Cattherine. Good Service Is Good Business: 7 Strategi Sederhana Menuju Sukses. Gramedia Pustaka Utama, 1997.
MLA (8th ed.) CitationDeVrye, Cattherine. Good Service Is Good Business: 7 Strategi Sederhana Menuju Sukses. Gramedia Pustaka Utama, 1997.
Warning: These citations may not always be 100% accurate.