Zeithaml, Valarie A.
Services marketing: integrating customer focus across the firm
McGraw-Hill, 2000
 Buku Teks
Zeithaml, Valarie A.
Services marketing : integrating customer focus across the firm
McGraw-Hill, 2013
 Buku Teks
Customer focus: obtaining customer input Barbara Aarmstrong
 Artikel Jurnal
Focus on the library customer: revelation,revolution,or redundancy?
 Artikel Jurnal
Sinaga, Bernadette Uly
Pengaruh interkasi dalam personalized services terhadap kualitas hubungan dalam membentuk loyalitas pelanggan : studi kasus terhadap kedai kopi Starbucks di Jakarta = The influence of customer firm interaction in personalized services on the relationship quality to form customer loyalty : a case study of the Starbucks Coffee Shop in Jakarta
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
 UI - Skripsi Membership