Perdjandjian volkenbond
edit oleh Mohammad Hatta
Publicate-Bureau, 1937
 Buku Teks SO
Swinderen, Eth de Marees van
Volkenbond en verenigde naties
Daarmen, 1946
 Buku Klasik
Carson, Richard L.
Comparative econnomic systems
Macmillan, 1973
 Buku Teks SO
Hague, Douglas C.
The essential of economics: an introduction and outline for students and for the general readers
Longmans, Green, 1955
 Buku Teks SO
Harriss, Clement Lowell, 1912-2009
Selected readings in economics
Prentice-Hall, 1967
 Buku Teks SO