Alam, M. A., & Macht, J. (1986). The effects of three experimental interventions on the spoken English proficiency of eighth grade Saudi Arabian students. University of Denver.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Alam, Mohammed Assad, و Joel Macht. The Effects of Three Experimental Interventions on the Spoken English Proficiency of Eighth Grade Saudi Arabian Students. Denver: University of Denver, 1986.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Alam, Mohammed Assad, و Joel Macht. The Effects of Three Experimental Interventions on the Spoken English Proficiency of Eighth Grade Saudi Arabian Students. University of Denver, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.