APA (7th ed.) Citation

Hall, J. L. (1981). Online bibliographic databases: An international directory (2nd ed.). ASLIB.

Chicago Style (17th ed.) Citation

Hall, James L. Online Bibliographic Databases: An International Directory. 2nd ed. London: ASLIB, 1981.

MLA (9th ed.) Citation

Hall, James L. Online Bibliographic Databases: An International Directory. 2nd ed. ASLIB, 1981.

Warning: These citations may not always be 100% accurate.