Sage Publications, 2005
Buku Teks
The Unesco Press, 1981
Buku Teks
edited by J. William Pfeiffer and John E. Jones
University Associates, 1985
Buku Teks
Shanks, Michael, author
Routledge, 1996
Buku Teks
Jurgen Ruland, Maria-Gabriela Manea, Hans Born, editors
[Springer, ], 2013
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