Frankel, I., & Irene Frankel. (2008). Center stage 1: Grammar to communicate. White Plains, NY: Pearson Education.
استشهاد بنمط شيكاغوFrankel, Irene, و Irene Frankel. Center Stage 1: Grammar to Communicate. White Plains, NY: Pearson Education, 2008.
MLA استشهادFrankel, Irene, و Irene Frankel. Center Stage 1: Grammar to Communicate. White Plains, NY: Pearson Education, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.