editors, S.P. Corder, E. Roulet
AIMAV, 1974
Buku Teks SO
Victoria A. Fromkin
Blackwell Publishers, 2001
Buku Teks SO
Salverda, Reinier
I.C.G. Printing, 1985
Buku Teks
Oxford, England : Oxford University Press
Majalah, Jurnal, Buletin
Oxford University Press, 1995
Majalah, Jurnal, Buletin