Ron White...[et al.]
Cambridge University Press , 1991
Buku Teks
Foreword by Wong Lian Aik
Center for English Language Communication. NUS, 2001
Buku Teks
Jesus Romero-Trillo, editor
Springer, 2012
eBooks
edited by James Flood, Julie M. Jensen, Diane Lapp, James R. Squire
Macmillan, 1991
Buku Referensi
Springer, 2016
Buku Teks