Gopalan, C.
World Health Organization, 1994
Buku Teks
London : IP Publishing Ltd
Majalah, Jurnal, Buletin
edited by Harold Brookfield and Yuonne Byron
United Nations University Press, 1993
Buku Teks
Gopalan, C.
World Health Organization, 1992
Buku Teks SO
Gopalan, C.
World Health Organization, 1992
Buku Teks SO