1Cochran, Lee W. (2004) Okoboji: A Twenty Year Review of Leadership 1955-1974[M].Greenwich, CT: Information Age Publishing, Inc. P255.
2Vivian Sue Penn. A Study of the Origin, Structure and Significance of the Lake Okoboji Educational Media Leadership Con ferences, 1955-1970[D].Unpublished doctoral dissertation, Temple, University, 1971, p. 194.
3Cochran, Lee W. (2004) Okoboji: A Twenty Year Review of Leadership 1955-1974 [M].Greenwich, CT: Information Age Publishing, Inc. P62.
4Donald Ely (1970). Toward a Philosophy of Instructional Technology[J].British Journal of Educational Technology, 1, 81-94.
5Cochran, Lee W. (2004) Okoboji: A Twenty year Review of Leadership 1955-1974[M].Greenwich, CT: Information Age Publishing, Inc. P254.
6Cochran, Lee W. (2004) Okoboji: A Twenty Year Review of Leadership 1955-1974 [M].Greenwieh, CT: Information Age Publishing, Inc. P209.
7Cochran, Lee W. (2004) Okoboji: A Twenty Year Review of Leadership 1955-1974[M].Greenwieh, CT: Information Age Publishing, Inc. P280.
8Dick Comell. Personal Communication via Email[Z].2005-10-30.
9Cochran, Lee W. (2004) Okoboji: A Twenty Year Review of Leadership 1955-1974 [M].Greenwieh, CT: Information Age Publishing, Inc. P210.
6Donald Ely. The Changing Role of the Audiovisual Process: A Definition and Glossary of Related Terms [J]. Audiovisual Communication Review,1962,11 ( 1 ), Supplement 6: 19.
8Donald Ely. Editor's Introduction: The Task and the Team, TDP Monograph NO. 1 [J]. AV Communications Review, 1962, 11 (1): 3-5.
9Donald Ely, Earl Funderburk, Leslie J. Briggs, David Engler, John E. Dietrich, Robert H. Davis and John Brademas. Comment on the Report of the Commission on Instructional Technology[J].Audio-Visual Communication Review, 1970, 18 (3):306-326.
10Alan Januszewski, Michael Molenda (Eds.).Educational Technology:A Definition with Commentary[M].New York:Lawrence Erlbaum Assoc., 2008.267,1,11.