Não informado. (1985). Building Services. Chartered Institution of Building Services Engineers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Building Services. London: Chartered Institution of Building Services Engineers, 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Building Services. Chartered Institution of Building Services Engineers, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.