Jessup, Ronald
Macdonald, 1968
Buku Teks
Christian Baumgartner , Martin Uitz, Karl Krainer, Peter Hasslacher
The Federal Press Service, 2002
Buku Referensi
Buku Teks
edited by Daniel Meyer-Dingrafe
Routledge, 2000
Buku Referensi
edited by Don Rubin, Peter Nagy and Philippe Rouyer
Routledge, 2001
Buku Referensi