Pergamon Press , 1979
Buku Teks
Maidment, Frederick, author
Prentice-Hall, 2000
Buku Teks
Maidment, Frederick, author
Prentice-Hall, 1999
Buku Teks
Giesen, Dieter, author
Martinus Nijhoff, 1988
Buku Teks
Eric Single ... [and others]
World Health Organization, 2003
Buku Teks