Stachokas, George
Chandos, 2014
eBooks
Kitahara, Yasusada
Heinemann Educational Books, 1983
Buku Teks
Brophy, Peter
Library Association Publishing, 2002
Buku Teks
Noe, Nancy W.
Chandos, 2013
eBooks
edited by Cynthia Steinke
Haworth Press, 1991
Buku Teks