Axe, J. (2019). The collagen diet: A 28-day plan for sustained weight loss, glowing skin, great gut health, and a younger you (First edition.). Little, Brown Spark.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Axe, Josh. The Collagen Diet: A 28-day Plan for Sustained Weight Loss, Glowing Skin, Great Gut Health, and a Younger You. First edition. New York: Little, Brown Spark, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Axe, Josh. The Collagen Diet: A 28-day Plan for Sustained Weight Loss, Glowing Skin, Great Gut Health, and a Younger You. First edition. Little, Brown Spark, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.