Palastanga, Nigel
Churchill Livingstone, 2012
Buku Teks
Nowra, Louis
Currency Press, 1977
Buku Teks
Myers, Thomas W.
Churchill Livingstone, 2001
Buku Teks
Hjelmslev, Louis
University of Wisconsin Press, 1970
Buku Teks
Thibodeaux, Louis J.
Wiley, 1996
Buku Teks