edited by S. Radhakrishna
Pergamon Press, 1980
Buku Teks
United Nations Children’s Fund , 1965
Buku Teks
Development Cooperation Information Department , 1994
Buku Teks
Alfian, author
LEKNAS, 1971
Buku Teks
edited by Arnold Pacey for Oxfam and the Ross Institute of Tropical Hygiene
John Wiley & Sons, 1978
Buku Teks