Wilson-Powell, G., & Abiitia Hill, A. K. (2021). Is it really green?: Everyday eco-dilemmas answered (First American edition.). DK Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wilson-Powell, Georgina, و Ana Karen Abiitia Hill. Is It Really Green?: Everyday Eco-dilemmas Answered. First American edition. New York, NY: DK Publishing, 2021.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wilson-Powell, Georgina, و Ana Karen Abiitia Hill. Is It Really Green?: Everyday Eco-dilemmas Answered. First American edition. DK Publishing, 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.