1
Έκδοση 1969
Full text available from ABI/INFORM Global: 01/01/1999 to present
Full text available from Continental Europe Database: 01/01/1999 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
2
Full text available from ABI/INFORM Global: 03/01/2004 to present
Full text available from Canadian Business & Current Affairs Database: 03/01/2004 to present
Full text available from Healthcare Administration Database: 03/01/2004 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
3
Έκδοση 1976
Full text available from ABI/INFORM Global: 01/01/2004 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
4
Έκδοση 2010
Full text available from ABI/INFORM Global: 01/01/2011 to 12/31/2011
Full text available from ABI/INFORM Global: 01/01/2014 to 07/31/2015
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
7
Full text available from ABI/INFORM Global: 05/01/2004 to present
Full text available from Continental Europe Database: 05/01/2004 to present
Full text available from Healthcare Administration Database: 05/01/2004 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό