The Multilateral economic co-operation of socialist states
Progress Publisher, 1977
Buku Teks
The kingdom of Saudi Arabia ministry of information: this is our country
Arabian Encyclopaedia House, 2001
Buku Referensi
Hutabarat, Arifin
To our beloved country: the history of Garuda Indonesia/Arifin Hutabarat
Ganesia , 1989
Buku Teks
Sachs, Jeffrey D.
The end of poverty : economic possibilities for our time
Penguin Books, 2005
Buku Teks
Harbison, Frederick Harris
Manpower and education : country studies in economic development
McGraw-Hill, 1965
Buku Teks