Artikel Jurnal
Artikel Jurnal
edited by Valerie Horton and Greg Pronevitz
ALA Editions, An imprint of the American Library Association, 2015
Buku Teks
Huber, Carlo
The Council for Research Values and Philosophy , 2001
Buku Teks
Gamble, Teri Kwal
Allyn and Bacon, 1994
Buku Teks