Walker, E. Ronald, author
University of Chicago Press, 1947
Buku Teks
edited by Cormac Flanagan, Barbara Konig
Springer-Verlag, 2012
eBooks
Roy Kristiawan, author
Universitas Indonesia, 2011
UI - Tesis (Open)
The University of Michigan Press, 1999
Buku Teks
The University Of Michigan Press, 1999
Buku Teks