(1997). Science for all children a guide to improving elementary science education in your school district / National Science Resources Center, National Academy of Sciences, Smithsonian Institution. [electronic resource].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Science for All Children a Guide to Improving Elementary Science Education in Your School District / National Science Resources Center, National Academy of Sciences, Smithsonian Institution. [electronic Resource]. 1997.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Science for All Children a Guide to Improving Elementary Science Education in Your School District / National Science Resources Center, National Academy of Sciences, Smithsonian Institution. [electronic Resource]. 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.