Studies in contrastive linguistics, no. 1 / edited by A. Hantson
Post-Graduate Centre, 1975
 Buku Teks
Studies in slavic and general linguistics volume 1 / edited by A.A. Barentsen, B.M. Groen, R. Sprenger
Radopi, 1980
 Buku Teks
Crystal, David, 1941-
The Cambridge encyclopedia of language
Cambridge University Press, 1994
 Buku Referensi
Crystal, David, 1941-
The Cambridge encyclopedia of language
Cambridge University Press, 1991
 Buku Referensi
Crystal, David, 1941-
The Cambridge encyclopedia of language
Cambridge University Press, 1997
 Buku Referensi