United Nations Development Program
Jakarta: United Nations Development Program, 1993,
Buku Referensi
Jones, Joseph Marion
Pergamon Press, 1965
Buku Teks
OPEC fund for International Development, 1998
Buku Referensi
United Nations Development Program
Jakarta: United Nations Development Program, 1993,
Buku Referensi
United Nations Development Program
Jakarta: United Nations Development Program, 1994,
Buku Referensi