University of Illinois Press , 1967
Buku Teks
Soedjono Dirdjosisworo, author
Utomo, 2004
Buku Teks
Heller, H Robert
Prentice-Hall, 1973
Buku Teks
Ryans, John K., author
Ohio Kent State University Press , 1974
Buku Teks
Magee, Stephen P.
Addison-Wesley , 1980
Buku Teks