edited by Benjamin Torun, Vernon R. Young, and William M. Rand
The United Nations University, 1981
Buku Teks
editor, Benjamin Torun ; penerjemah, Kristono
Pradnya Paramita, 1986
Buku Teks
Van Duyn, Julia, author
Prentice-Hall, 1982
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Mellova Amir Masrizal, author
Lembaga Penelitian Universitas Indonesia, 2003
Artikel Jurnal
Universit of Alexandria , 1992
Buku Teks