1. Papers on Broadcasting;A.W. Bates,1981
2. Biggs, J.B. (1987).Student approaches to studying and learning. Melbourne, Vic.: Australian Council for Educational Research.
3. Brooks, J.G., & Brooks, M.G. (1999).In search of understanding: The case for constructivist classrooms (rev. ed.). Alexandria, VA: Association for Supervision and Curriculum Development.
4. White paper;D. Clark,2004
5. Curry, A. (2004).iPodder — A brief history. Retrieved April 23, 2005, from http://www.ipodder.org/history.