Arnold, part of the Hodder Headline group, 2018
Majalah, Jurnal, Buletin
Aldridge, W. Norman
Taylor and Francis, 1996
Buku Teks
Macmillan 1995, 1995
Buku Teks
Andreas Luch, editor
[, Springer], 2012
eBooks
edited by Ernest Hodgson
John Wiley & Sons, 2010
Buku Teks