executive, H. a. s. (2007). Memorandum of guidance on the electricity at work regulations 1989. New York, NY : Health and Safety Executive.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)executive, Health and safety. Memorandum of Guidance on the Electricity at Work Regulations 1989. New York, NY : Health and Safety Executive, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)executive, Health and safety. Memorandum of Guidance on the Electricity at Work Regulations 1989. New York, NY : Health and Safety Executive, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.