Dabaan, I. S., & Hughes, G. H. (1977). The effectiveness of the language laboratory in terms of the needs of Saudi Arabia. University of Kansas,Faculty of The Graduate School, Department of Curriculum and Instruction.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dabaan, Ibrahim S., و George H. Hughes. The Effectiveness of the Language Laboratory in Terms of the Needs of Saudi Arabia. University of Kansas,Faculty of The Graduate School, Department of Curriculum and Instruction, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Dabaan, Ibrahim S., و George H. Hughes. The Effectiveness of the Language Laboratory in Terms of the Needs of Saudi Arabia. University of Kansas,Faculty of The Graduate School, Department of Curriculum and Instruction, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.