Boyden, D. P. (1989). 1989 Gale Directory of publications update: An interedition service reporting more than 3,000 changes to publications listed in the base volume and adding about. Gale Research.
Chicago-Zitierstil (17. Ausg.)Boyden, Donald P. 1989 Gale Directory of Publications Update: An Interedition Service Reporting More than 3,000 Changes to Publications Listed in the Base Volume and Adding About. Detroit, MI: Gale Research, 1989.
MLA-Zitierstil (9. Ausg.)Boyden, Donald P. 1989 Gale Directory of Publications Update: An Interedition Service Reporting More than 3,000 Changes to Publications Listed in the Base Volume and Adding About. Gale Research, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.