Cliff, H. (2021). How to make an apple pie from scratch: In search of the recipe for our universe, from the origins of atoms to the big bang (First edition.). Doubleday.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cliff, Harry. How to Make an Apple Pie from Scratch: In Search of the Recipe for Our Universe, from the Origins of Atoms to the Big Bang. First edition. New York: Doubleday, 2021.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Cliff, Harry. How to Make an Apple Pie from Scratch: In Search of the Recipe for Our Universe, from the Origins of Atoms to the Big Bang. First edition. Doubleday, 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.