Language...
 Buku Teks
Language
 Buku Teks
The encyclopaedia of birds
edited by Christopher M. Perrins and Alex L.A. Middleton
Grolier International, 1993
 Buku Referensi
Encyclopaedia of textiles
edited by P.V. Vidyasagar
Mittal Publications, 2000
 Buku Referensi
Slavonic encyclopaedia
edited by Joseph S. Roucek
Philosophical Library, 1949
 Buku Referensi