Cruz, C. E. A study of the scholarship of students engaged in extra-curricular activities at the University of the Philippines. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cruz, Carmen Espiritu. A Study of the Scholarship of Students Engaged in Extra-curricular Activities at the University of the Philippines. Quezon City: University of the Philippines Library.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cruz, Carmen Espiritu. A Study of the Scholarship of Students Engaged in Extra-curricular Activities at the University of the Philippines. University of the Philippines Library.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.