Παραπομπή APA

Ewan, E. E., Hursh, S. R., Madden, G. J., & Smethells, J. R. Tests of behavioral-economic assessments of relative reinforcer efficacy: Economic substitutes.

Παραπομπή Chicago Style

Ewan, Eric E., Steven R. Hursh, Gregory J. Madden, και John R. Smethells. Tests of Behavioral-economic Assessments of Relative Reinforcer Efficacy: Economic Substitutes.

Παραπομπή MLA

Ewan, Eric E., Steven R. Hursh, Gregory J. Madden, και John R. Smethells. Tests of Behavioral-economic Assessments of Relative Reinforcer Efficacy: Economic Substitutes.

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