Cadena, E. C. V. (1974). A study of the attitudes of students and their parents on human population education. s.n.].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cadena, Elisa Celia Villalobos. A Study of the Attitudes of Students and Their Parents on Human Population Education. [Quezon City: s.n.], 1974.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cadena, Elisa Celia Villalobos. A Study of the Attitudes of Students and Their Parents on Human Population Education. s.n.], 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.