edited by George Mckenzie, Jackie Powell, Robin Usher
The Falmer Press, 1997
Buku Teks SO
edited by Joyce Liddle
Emerald, 2016
eBooks
Schröpfer, Thomas
Springer Singapore, 2019
eBooks
Schröpfer, Thomas
Springer Singapore, 2019
eBooks
Beach, David P.
Prentice-Hall, 1992
Buku Referensi