edited by R.G. Priest [and others]
MTP Press, 1980
Buku Teks
Starr, Cecie, author
Brooks/Cole Cengage Learning, 2013
Buku Teks
Corry, Stephen, author
Freeman Press, 2011
Buku Teks
Association for Civil Society Development in azerbaijin, 2008
Majalah, Jurnal, Buletin
Gorman, Michael, author
Libraries Unlimited, 1990
Buku Teks