Gourou, Pierre
The tropical world : its social and economic conditions and its future status
Longmans, Green, 1954
 Buku Teks SO
The Europa year book 1929 : an annual survey of economic and social conditions
edited by Michael Farbman
Europa Publications, 1929
 Buku Teks SO
Soviet Documents on Foreign policy
Oxford University Press, 1951
 Buku Teks SO
Jones, Antoinette M. Barrett
Early tenth century Java from the inscriptions : a study of economic, social, and administrative conditions in the first quarter of the century
Foris Publications, 1984
 Buku Teks SO
Soviet foreign policy in a changing world
edited by Robbin F. Laird and Erik P. Hoffman
Aldine de Gruyter, 1986
 Buku Teks SO