Coletta, A. J., & Coletta, K. (1986). Year 'round activities for two-year-old children. Center for Applied Research in Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Coletta, Anthony J., و Kathleen Coletta. Year 'Round Activities for Two-year-old Children. West Nyack, N.Y: Center for Applied Research in Education, 1986.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Coletta, Anthony J., و Kathleen Coletta. Year 'Round Activities for Two-year-old Children. Center for Applied Research in Education, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.