edited by Jack Davis and Robert Lecker
General Publishing, 1982
Buku Teks
Australian Red Cross, 1995
Buku Teks
by Yoichi Okazaki [and others]
Foreign Press Center, 1990
Buku Teks
edited by Ernesto U.Savona
Harwood Academic Publisher, 1997
Buku Teks
Ray, Keith
New York: McGraw-Hill, 1980
Buku Teks