1
Argitaratua 2003
Full text available from ABI/INFORM Global: 01/01/2003 to 08/31/2005
Baliabide elektronikoa Aldizkaria
4
Argitaratua 1999
Full text available from Accounting & Tax Database: 08/01/2006 to present
Baliabide elektronikoa Aldizkaria
7
Argitaratua 2000
Full text available from Accounting & Tax Database: 07/01/2007 to present
Baliabide elektronikoa Aldizkaria
9
Argitaratua 2002
Full text available from ABI/INFORM Global: 04/01/2000 to 12/31/2002
Baliabide elektronikoa Aldizkaria
17
18
Available in Education Source.
Baliabide elektronikoa Aldizkaria
19
Available in Education Source.
Baliabide elektronikoa Aldizkaria
20
Argitaratua 1990
Available in Education Source.
Baliabide elektronikoa Aldizkaria