توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Howe, C., Nunes, T., & Bryant, P. (2011). RATIONAL NUMBER AND PROPORTIONAL REASONING: USING INTENSIVE QUANTITIES TO PROMOTE ACHIEVEMENT IN MATHEMATICS AND SCIENCE.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Howe, C., T. Nunes, و P. Bryant. RATIONAL NUMBER AND PROPORTIONAL REASONING: USING INTENSIVE QUANTITIES TO PROMOTE ACHIEVEMENT IN MATHEMATICS AND SCIENCE. 2011.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Howe, C., et al. RATIONAL NUMBER AND PROPORTIONAL REASONING: USING INTENSIVE QUANTITIES TO PROMOTE ACHIEVEMENT IN MATHEMATICS AND SCIENCE. 2011.