Παραπομπή APA

Schmittroth, J. (1982). Encyclopedia of information systems and services (5th ed.). Michigan: Gale Research Company.

Παραπομπή Chicago Style

Schmittroth, John. Encyclopedia of Information Systems and Services. 5th ed. Michigan: Gale Research Company, 1982.

Παραπομπή MLA

Schmittroth, John. Encyclopedia of Information Systems and Services. 5th ed. Michigan: Gale Research Company, 1982.

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