Bormann, Ernest G., author
Harper & Row, 1965
Buku Teks
Janssen, Theo
Sdu Uitgevers, 1997
Buku Teks
Lieberman, Philip
Cambridge University Press, 1988
Buku Teks
Cristina Sanz editor
Georgetown University Press, 2005
Buku Teks
Gerard Bailly, Pascal Perrier, Eric Vatikiostis-Bateson, editors
[Cambridge University Press;, ], 2012
eBooks