Ryan, Michael, author
Blackwell, 2007
Buku Teks
Ryan, Michael, 1951-, author
Wiley-Blackwell, 2017
Buku Teks
Richards, I.A., author
Routledge , 1991
Buku Teks
Brandt, J. J., author
Peking Arthur Probsthain 1927
Buku Teks
Klarer, Mario, 1962-, author
Routledge, 2005
Buku Teks