Reference services in the humanities
edited by Judy Reynolds
Haworth Press, 1994
 Buku Referensi
Bopp, Richard E.
Reference and information services : an introduction
Libraries Unlimited, 2001
 Buku Teks SO
Cassel, Kay Ann
Reference and information services in the 21st century : an introduction
Faced Publishing, 2009
 Buku Teks SO
Cassell, Kay Ann
Reference and information services : an introduction
Neal-Schuman, an imprint of the American Library Association, 2013
 Buku Teks SO
Rifni Raihana
Layanan referensi perpustakaan perguruan tinggi: studi kasus di Institut Pertanian Bogor = Reference services in academic Library: case study at Bogor Agricultural University
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2017
 UI - Skripsi Open