Hood, L., & Bloom, L. (1979). What, when, and how about why: A longitudinal study of early expressions of causality. Published by the University of Chicago Press for the Society for Research in Child Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hood, Lois, و Lois Bloom. What, When, and How About Why: A Longitudinal Study of Early Expressions of Causality. Chicago, Ill: Published by the University of Chicago Press for the Society for Research in Child Development, 1979.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Hood, Lois, و Lois Bloom. What, When, and How About Why: A Longitudinal Study of Early Expressions of Causality. Published by the University of Chicago Press for the Society for Research in Child Development, 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.