Eppelbaum, Lev, author
Springer, 2012
eBooks
Universitas Indonesia, 2007
UI - Skripsi (Membership)
McWilliams, James C., author
Cambridge University Press, 2006
Buku Teks
Persen, Lief R., author
Elsevier, 1975
Buku Teks
Schwind, Joseph J. von, author
Prentice-Hall, 1980
Buku Teks