Steele, P. (1995). I wonder why...pyramids were built and other questions about ancient Egypt. Reader's Digest Young Families.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Steele, Philip. I Wonder Why...pyramids Were Built and Other Questions About Ancient Egypt. Pleasantville, NY: Reader's Digest Young Families, 1995.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Steele, Philip. I Wonder Why...pyramids Were Built and Other Questions About Ancient Egypt. Reader's Digest Young Families, 1995.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.