(1967). Developing programmed instructional materials ; a handbook for program writers / [by] James E. Espich & Bill Williams.
Čikaški stil citiranja (17. izdanje)Developing Programmed Instructional Materials ; a Handbook for Program Writers / [by] James E. Espich & Bill Williams. 1967.
MLA način citiranja (9. izdanje)Developing Programmed Instructional Materials ; a Handbook for Program Writers / [by] James E. Espich & Bill Williams. 1967.
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