Collier, P. (2017). A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity (Third edition.). Incomprehensible Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Collier, Peter. A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity. Third edition. Harlow, England: Incomprehensible Books, 2017.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Collier, Peter. A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity. Third edition. Incomprehensible Books, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.