Jumbo Chalco, A. C. (2019). The influence of cooperative learning activities on the development of English speaking skills in a private high school in the city of Loja.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jumbo Chalco, Andrea Cruzkaya. The Influence of Cooperative Learning Activities on the Development of English Speaking Skills in a Private High School in the City of Loja. 2019.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Jumbo Chalco, Andrea Cruzkaya. The Influence of Cooperative Learning Activities on the Development of English Speaking Skills in a Private High School in the City of Loja. 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.