Keller, L. A., & Keller, R. R. The long-term sustainability of different item response theory scaling methods.
استشهاد بنمط شيكاغوKeller, Lisa A., و Robert R. Keller. The Long-term Sustainability of Different Item Response Theory Scaling Methods.
MLA استشهادKeller, Lisa A., و Robert R. Keller. The Long-term Sustainability of Different Item Response Theory Scaling Methods.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.