Doughty, K. (2014). Adding layers: Color, design & imagination : 15 original quilt projects from Kathy Doughty of Material obsession. StashBooks, an imprint of C&T Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Doughty, Kathy. Adding Layers: Color, Design & Imagination : 15 Original Quilt Projects from Kathy Doughty of Material Obsession. Lafayette, CA: StashBooks, an imprint of C&T Publishing, 2014.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Doughty, Kathy. Adding Layers: Color, Design & Imagination : 15 Original Quilt Projects from Kathy Doughty of Material Obsession. StashBooks, an imprint of C&T Publishing, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.