National Conference on Performance Contracting in Education, Washington, D.C, American Educational Research Association, American Association of School Administrators, & Levine, D. M. (1972). Performance contracting in education--an appraisal: Toward a balanced perspective. Educational Technology Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Conference on Performance Contracting in Education, Washington, D.C, American Educational Research Association, American Association of School Administrators, और Donald M. Levine. Performance Contracting in Education--an Appraisal: Toward a Balanced Perspective. Englewood Cliffs, N.J.: Educational Technology Publications, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Conference on Performance Contracting in Education, Washington, D.C, et al. Performance Contracting in Education--an Appraisal: Toward a Balanced Perspective. Educational Technology Publications, 1972.