edited by Richard B. Noss
SEAMEO Regional Language Centre, 1982
Buku Teks SO
Summer Institute of Linguistics (Philippines) : Linguistic Society of the Philippines, 1981
Buku Teks SO
WHO
WHO, 2006
Buku Teks
P.t the Centre for south-East Asia studies University of Hull 1989,
Buku Teks
Oxford University Press, 1973
Buku Teks