Ferrer, M. (1975). An analytical study of the mental ability, academic achievement, and personality characteristics of grade, IV, V, VI and VII pupils at Good Shepherd Special schools [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ferrer, Mary. An Analytical Study of the Mental Ability, Academic Achievement, and Personality Characteristics of Grade, IV, V, VI and VII Pupils at Good Shepherd Special Schools [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ferrer, Mary. An Analytical Study of the Mental Ability, Academic Achievement, and Personality Characteristics of Grade, IV, V, VI and VII Pupils at Good Shepherd Special Schools [microform]. Photoduplication Service, University of the Philippines Library, 1975.