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 Style (17th ed.) CitationBoyden, 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 (9th ed.) CitationBoyden, 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.
Warning: These citations may not always be 100% accurate.