Hall, J. L. (1986). Online bibliographic databases: A directory and sourcebook (4th ed.). Aslib.
Chicago Style (17th ed.) CitationHall, J. L. Online Bibliographic Databases: A Directory and Sourcebook. 4th ed. London: Aslib, 1986.
MLA (9th ed.) CitationHall, J. L. Online Bibliographic Databases: A Directory and Sourcebook. 4th ed. Aslib, 1986.
Warning: These citations may not always be 100% accurate.