Popkin, G. S., & Pike, A. H. (1981). Introduction to data processing (2nd ed.). Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Popkin, Gary S., agus Arthur H. Pike. Introduction to Data Processing. 2nd ed. Boston: Houghton Mifflin, 1981.
Lua MLA (9ú heag.)Popkin, Gary S., agus Arthur H. Pike. Introduction to Data Processing. 2nd ed. Houghton Mifflin, 1981.
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