United States. Office of Education, National Institute of Education, & Harrison, S. A. (1975). Improving instructional productivity in higher education. Educational Technology Pub.
Lua i Stíl Chicago (17ú heag.)United States. Office of Education, National Institute of Education, agus Shelley A. Harrison. Improving Instructional Productivity in Higher Education. Englewood Cliffs, N. J: Educational Technology Pub, 1975.
Lua MLA (9ú heag.)United States. Office of Education, et al. Improving Instructional Productivity in Higher Education. Educational Technology Pub, 1975.
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