Não informado. (1975). Quarterly progress and status report. Royal Institute of Technology, Department of Speech Communication and Music Accoustics.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Quarterly Progress and Status Report. Stockholm: Royal Institute of Technology, Department of Speech Communication and Music Accoustics, 1975.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Quarterly Progress and Status Report. Royal Institute of Technology, Department of Speech Communication and Music Accoustics, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.