APA (7th ed.) Citation

(1989). Encyclopedia of information systems and services 1989 (9th ed.). Gale Research.

Chicago Style (17th ed.) Citation

Encyclopedia of Information Systems and Services 1989. 9th ed. Detroit: Gale Research, 1989.

MLA (9th ed.) Citation

Encyclopedia of Information Systems and Services 1989. 9th ed. Gale Research, 1989.

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