edited by Marcelo Dascal, Dietfired Gerhardus, Kuno Lorenz and Georg Meggle
Walter de Gruyter, 1996
Buku Referensi
Schomburg, Dietmar
Springer-Verlag, 1990
Buku Referensi
Fraga, Serafin, author
Elsevier, 1976
Buku Referensi
Anderson, Philip O.
McGraw-Hill, 2001
Buku Referensi
Anderson, Philip O., editor
McGraw-Hill, 2002
Buku Referensi