Popov, Kostadin
Cultural policy in Bulgaria
Unesco Press, 1981
 Buku Teks
R. Vassilev
Sociology in Bulgaria
Publishing House of the Bulgaria, 1970
 Buku Teks
Konstitusi Bulgaria
editor, S. Prajudi Atmosudirdjo ...[et al.]
Ghalia Indonesia, 1987
 Buku Teks
Yeh, Stephen H.K.
On the analysis of cultural and human resource development
UNESCO, 1990
 Buku Teks
Economic development and cultural change. Vol.19-21
The The University of Chicago
The University of Chicago Press, 1972
 Buku Teks