Del Pezo Orrala, F. R. (2016). Motivational strategies to improve speaking skills on students of eighth year of basic education at escuela Luis Augusto Mendoza Moreira, La Libertad, Santa Elena province, 2015-2016.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Del Pezo Orrala, Fernando Ricardo. Motivational Strategies to Improve Speaking Skills on Students of Eighth Year of Basic Education at Escuela Luis Augusto Mendoza Moreira, La Libertad, Santa Elena Province, 2015-2016. 2016.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Del Pezo Orrala, Fernando Ricardo. Motivational Strategies to Improve Speaking Skills on Students of Eighth Year of Basic Education at Escuela Luis Augusto Mendoza Moreira, La Libertad, Santa Elena Province, 2015-2016. 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.