Organisation for Economic Co-operation and Development. (2019). OECD environmental performance reviews: Denmark 2019. Organisation for Economic Co-operation and Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Organisation for Economic Co-operation and Development. OECD Environmental Performance Reviews: Denmark 2019. Paris, France: Organisation for Economic Co-operation and Development, 2019.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Organisation for Economic Co-operation and Development. OECD Environmental Performance Reviews: Denmark 2019. Organisation for Economic Co-operation and Development, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.