Geneva, WHO, 1995.,
Buku Teks
Geneva WHO 1995 , 1995
Buku Teks
Krauel, Jacobo, author
Linksbooks, [date of publication not identified]
Buku Referensi
Garrett, Raymond D.
Auerbach Publishers, Inc., 1973
Buku Teks
Gerr, Dave, author
International Marine / McGraw-Hill, 2009
Buku Referensi