Llewelyn-Davies, R.
World Health Organization, 1966
Buku Teks
Robinson, Geoffrey A.
Butterworth, 1966
Buku Teks
Canfield, Bertrand R.
Prentice-Hall, 1961
Buku Teks
Rowland, Howard S.
An Aspen Publication, 1984
Buku Teks
Bailey, Norman D.
Physicians Record Company, 1959
Buku Teks