Chandos, 2013
eBooks
Roberto De Virgilio, editor
Springer-Verlag, 2012
eBooks
Rowley, J.E., author
Ashgate, 1992
Buku Teks
Hagler, Ronald, author
American Library Association, 1991
Buku Teks
Hagler, Ronald, author
American Library Association, 1997
Buku Teks