edited by Monrad G. Paulsen
Columbia University Press, 1959
Buku Teks
edited by R.G. Priest [and others]
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Buku Teks
Starr, Cecie, author
Brooks/Cole Cengage Learning, 2013
Buku Teks
Association for Civil Society Development in azerbaijin, 2008
Majalah, Jurnal, Buletin
Gorman, Michael, author
Libraries Unlimited, 1990
Buku Teks