Knox, A. B. (1979). Assessing the impact of continuing education. Jossey-Bass.
Lua i Stíl Chicago (17ú heag.)Knox, Alan B. Assessing the Impact of Continuing Education. San Francisco: Jossey-Bass, 1979.
Lua MLA (9ú heag.)Knox, Alan B. Assessing the Impact of Continuing Education. Jossey-Bass, 1979.
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