Fries, Charles Carpenter
University of Michigan Press, 1951
Buku Teks
Ron White...[et al.]
Cambridge University Press , 1991
Buku Teks
The Chinese University Press, 2001
Majalah, Jurnal, Buletin
Jesus Romero-Trillo, editor
Springer, 2012
eBooks
Foreword by Wong Lian Aik
Center for English Language Communication. NUS, 2001
Buku Teks