APA način citiranja (7. izdanje)
Nagel, T., & Richman, P. T. (1972). Competency-based instruccion: A strategy to eliminate failure : a branching programmed text.
Čikaški stil citiranja (17. izdanje)
Nagel, Thomas, i Paul T. Richman. Competency-based Instruccion: A Strategy to Eliminate Failure : A Branching Programmed Text. 1972.
MLA način citiranja (9. izdanje)
Nagel, Thomas, i Paul T. Richman. Competency-based Instruccion: A Strategy to Eliminate Failure : A Branching Programmed Text. 1972.
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