Evaluation of reference services
edited by Bill Katz and Ruth A. Fraley
Haworth Press, 1984
 Buku Referensi
Lankes, R. David
Implementing digital reference services : setting standards and making it real
Facet Publishing, 2003
 Buku Teks
Kern, M. Kathleen
Virtual reference best practices: tailoring services to your library
American Management Association, 2009
 eBooks
McMenemy, David
Delivering digital services : a handbook for public libraries and learning centres
Facet, 2006
 Buku Referensi
Hani Kusumaningsih
Evaluasi layanan referensi e-mail Perpustakaan United Nations Information Centre Jakarta = Evaluation of e-mail reference at United Nations Information Centre Library Jakarta
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2016
 UI - Skripsi Membership