Environmental Protection UK. (2014). Essential environment: A comprehensive guide to UK and EU environment protection legislation (Edition 36.). Environmental Technology Publications Ltd.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Environmental Protection UK. Essential Environment: A Comprehensive Guide to UK and EU Environment Protection Legislation. Edition 36. Hertfordshire, [England]: Environmental Technology Publications Ltd, 2014.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Environmental Protection UK. Essential Environment: A Comprehensive Guide to UK and EU Environment Protection Legislation. Edition 36. Environmental Technology Publications Ltd, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.