APA
UNESCO, . (1973). The Present situation and trends of research in the field of special education. Unesco, Paris: .
Chicago
UNESCO, . 1973. The Present situation and trends of research in the field of special education. Unesco, Paris: .
Harvard
UNESCO, . (1973). The Present situation and trends of research in the field of special education. Unesco, Paris: .
MLA
UNESCO, . The Present situation and trends of research in the field of special education. Unesco, Paris: . 1973.