Ferrin, R. I. (1971). A decade of change in free-access higher education. College Entrance Examination Board.
Chicago-referens (17:e uppl.)Ferrin, Richard I. A Decade of Change in Free-access Higher Education. New York: College Entrance Examination Board, 1971.
MLA-referens (9:e uppl.)Ferrin, Richard I. A Decade of Change in Free-access Higher Education. College Entrance Examination Board, 1971.
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