Ahearn, Laura M. author
John Wiley & Sons, Incorporated,, 2016
Buku Teks
Malcolm Offord... [et al]
Routledge , 2001
Buku Teks
Schiffman, Harold F.
Routledge, 1996
Buku Teks
edited by Ralph Ludwig, Peter Mühlhäusler and Steve Pagel
Cambridge University Press, 2019
Buku Teks
Salzmann, Zdenek
Westview Press, 998
Buku Teks