Young, D. H. (1977). Pupil-directed versus teacher directed classrooms: Changes in work-study skills at three achievement levels [microform]. Photoduplication Service. University of the Philippines Library.
Cita Chicago (17th ed.)Young, Donna H. Pupil-directed Versus Teacher Directed Classrooms: Changes in Work-study Skills at Three Achievement Levels [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Cita MLA (9th ed.)Young, Donna H. Pupil-directed Versus Teacher Directed Classrooms: Changes in Work-study Skills at Three Achievement Levels [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.