Encyclopedia of linguistics : volume 2
Philipp Strazny, editor
Fitzroy Dearborn, 2005
 Buku Referensi
International encyclopedia of linguistics; Volume 1
William Bright, editor-in-chief
Oxford University Press, 1992
 Buku Referensi
International encyclopedia of linguistics : volume 3
William Bright, editor-in-chief
Oxford University Press, 1992
 Buku Referensi
International encyclopedia of linguistics; Volume 4
William Bright, editor-in-chief
Oxford University Press, 1992
 Buku Referensi
Encyclopedia of linguistics : volume 1
Philipp Strazny, editor
Fitzroy Dearborn, 2005
 Buku Referensi