Lapping, Claudia, author
Routledge, 2011
Buku Teks
edited by Myint Swe Khine
Springer, 2012
eBooks
edited by Edward J. Blakely
Human Science Press, 1979
Buku Teks
Hawley, Christine, author
Ashgate, 2013
Buku Teks
Ostle, Bernard
The Iowa State University Press, 1963
Buku Teks