Elisa Morgera, Kati Kulovesi
Edward Elgar, 2016
Buku Teks
El-Erian, Abdalla A.
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Buku Teks
Martin Bartels ...[et al.]
Metzner, 1981
Buku Teks
edited by Richard Burchill, Nigel D. White and Justin Morris
Cambridge University Press, 2005
Buku Teks
M. Bender, 1986
Buku Teks