Wells, A.F.
John Wiley & Sons, 1977
Buku Teks
Cedergren, Harry R.,
John Wiley & Sons, 1977
Buku Teks
John Wiley & Sons, 2008
eBooks
World Health Organization
World Health Organization, 1991
Buku Teks
edited by Kurt Jensen
Springer-Verlag, 2012
eBooks