Hasan, A. (1978). The book in multilingual countries. Unesco.
Chicago Style aipamenaHasan, Abul. The Book in Multilingual Countries. Paris: Unesco, 1978.
MLA aipamenaHasan, Abul. The Book in Multilingual Countries. Unesco, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.