edited by Martin Fransman, Gerd Junne and Annemieke Roobeek
Blackwell, 1995
Buku Teks
Smith, John E., author
Gramedia, 1990
Buku Teks
Butterworth-Heinemann, 1993
Buku Teks
edited by Paul N. Cheremisinoff, Robert P. Quellette
Pennsylvania Technomic , 1997
Buku Teks
Rittman, Bruce E., author
McGrow-Hill , 2001
Buku Teks