توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Rohayati Akmal Mohd Noor. (2011). An investigation on the effectiveness of learning a second language during the critical period in early childhood years.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Rohayati Akmal Mohd Noor. An Investigation on the Effectiveness of Learning a Second Language During the Critical Period in Early Childhood Years. 2011.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Rohayati Akmal Mohd Noor. An Investigation on the Effectiveness of Learning a Second Language During the Critical Period in Early Childhood Years. 2011.