The Caxton Press, 1970
Majalah, Jurnal, Buletin
The Caxton Press, 1970
Majalah, Jurnal, Buletin
Brainerd, Walter S., author
Boyd & Fraser Publishing Company, 1986
Buku Teks
Takada, Noriko, author
Macmillan, 1995
Buku Teks
Alfonso, Anthony, author
Sophia University LL Center of Applied Linguistics, 1980
Buku Teks