Katz, Wiliiam A.
Introduction to reference work : volume II, reference services and reference processes / William A. Katz
McGraw-Hill, 1992
Buku Referensi
Palmer, Roger C.
Online reference and information retrieval / Roger C. Palmer
Libraries Unlimited, 1987
Buku Referensi
Expert systems in reference services / Christine Roysdon, Howard D. White, editors
Haworth Press, 1989
Buku Referensi
Katz, Wiliiam A.
Introduction to reference work : volume I, basic information sources / William A. Katz
McGraw-Hill, 1992
Buku Referensi
Profil desa tertinggal Indonesia 1994 / penyunting Mubyarto
Aditya Media, 1994
Buku Teks