Progress in language planning: international perspectives
edited by Juan Cobarrubias and Joshua A. Fishman
Mouton, 1983
 Buku Teks SO
Claude, Inis L.
Swords into plowshares the problems and progress of international organization
Random House, 1956
 Buku Teks SO
Sanyal, Rajib N.
International management : a strategic perspective
Prentice-Hall, 2001
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Colquhoun, Ian
Housing design : an international perspective
B.T. Batsford, 1991
 Buku Referensi
International law in comparative perspective
edited by William E. Butler
Sijthoff & Noordhoff, 1980
 Buku Teks SO