1Lorraine Mueller.the educational theory of David Perkins[EB/ OL]. http://www.newfoundations.com/GALLERY/Perkins.html. 2009-01- 12.
2D. N. Perkins.Ph.D.mindware and the metacurriculum[EB/OL]. http://w~.newhorizons.org/future/Creating_the_Future/crfut_perkins. html .2009-02-01.
3D. N. Perkins.Ph.D.mindware and the metacurriculum[EB/OL]. http://www.newhorizons.org/future/Creating_the_Future/crfut_perkins. html .2009-02-01.
4David Ackennan and D.N. Perkins. Integrating Thinking and Learning Skills Across the Curriculum [EB/OL]. http://www.ased.org/ publications/books/61189156/ehapters/Integrating_Thinking and Learning__Skills_Aeross the Currieulum.aspx. 2009-02-18.
5DavidN.Perkins.Creating the Metacurriculum [EB/OL]. http://www.edweek.org/ew/articles/1993/02/24/22perk.h12.html. 2009-01-12.
