edited by H.J. Caulfield
Academic Press, 1979
Buku Referensi
Carlson, John E.
McGraw-Hill, 1981
Buku Teks
edited by Minko Balkanski
North-Holland Publishing, 1980
Buku Referensi
Melton, J. Gordon
Garland Publishing, 1986
Buku Referensi
Baltimore : The Linguistic Society of America
Majalah, Jurnal, Buletin