Lewis, G. (2022). The complete book of ground covers: 4000 plants that reduce maintenance, control erosion, and beautify the landscape. Timber Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lewis, Gary. The Complete Book of Ground Covers: 4000 Plants That Reduce Maintenance, Control Erosion, and Beautify the Landscape. Portland, Oregon: Timber Press, 2022.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lewis, Gary. The Complete Book of Ground Covers: 4000 Plants That Reduce Maintenance, Control Erosion, and Beautify the Landscape. Timber Press, 2022.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.