Graham, Loren R., author
Cambridge University Press, 1993
Buku Teks
Zvorykin, A.A., author
UNESCO, 1977
Buku Teks
edited by Alexander Dallin, Alan F. Westin
Harcourt, Brace and World, 1966
Buku Teks
Basic Books, Inc Publisher, 1966
Buku Teks
Larasati Meidiana, author
2015
UI - Makalah dan Kertas Kerja