薩德伯里學校 (Chinese Wikipedia)

Gray, Peter. Nature's Powerful Tutors; The Educative Functions of Free Play. The National Honor Society in Psychology. [2009-07-25]. （原始内容存档于2012-09-07）.

books.google.com (Global: 3^rd place; Chinese: 8^th place)

Mimsy Sadofsky; Daniel Greenberg. The Kingdom of Childhood: Growing Up at Sudbury Valley School. The Sudbury Valley School Press. 1994 [1 May 2013]. ISBN 978-1-888947-02-1. , p. xv
Daniel Greenberg. Free at Last: The Sudbury Valley School Press. The Sudbury Valley School Press. 1 June 1995 [1 May 2013]. ISBN 978-1-888947-00-7. , p34

ed.gov (Global: 576^th place; Chinese: 1,959^th place)

eric.ed.gov

Feldman, Jay. The Moral Behavior of Children and Adolescents at a Democratic School (PDF). Paper presented at 82nd American Educational Research Association Meeting. Seattle. 2001.

gatesfoundation.org (Global: low place; Chinese: low place)

k12education.gatesfoundation.org

RAND Corporation. Early Progress: Interim Research on Personalized Learning (PDF) (pdf). Bill & Melinda Gates Foundation. 2014-11 [2016-09-03]. （原始内容 (PDF)存档于2016-09-10）.

johntaylorgatto.com (Global: low place; Chinese: low place)

John Taylor Gatto (2000-2003) The Underground History of American Education - A Schoolteacher's Intimate Investigation Into The Problem Of Modern Schooling, Chapter Three - Eyeless In Gaza, The Sudbury Valley School 互联网档案馆的存檔，存档日期2010-01-02.. Retrieved, December 27, 2009.

psichi.org (Global: low place; Chinese: low place)

Gray, Peter. Nature's Powerful Tutors; The Educative Functions of Free Play. The National Honor Society in Psychology. [2009-07-25]. （原始内容存档于2012-09-07）.

psychologytoday.com (Global: 1,544^th place; Chinese: 1,911^th place)

Gray, Peter. Why We Should Stop Segregating Children by Age: Part I--The Value of Play in the Zone of Proximal Development. Psychology Today. 2008-09-09 [2009-10-25]. .

sudburyschools.directory (Global: low place; Chinese: low place)

List of Sudbury Model schools. [2016-09-03]. （原始内容存档于2016-10-10）.

sudburyvalley.org (Global: low place; Chinese: low place)

bookstore.sudburyvalley.org

The 2002 Collection （页面存档备份，存于互联网档案馆）, Sudbury Valley School Press, pp5-14

sudval.com (Global: low place; Chinese: low place)

The Birth of a New Paradigm for Education （页面存档备份，存于互联网档案馆） by Dan Greenberg in The Sudbury Valley School Experience, 3rd ed. (Sudbury Valley School Press; Framingham, 1992), p. 81ff
Greenberg, D. (1987) The Sudbury Valley School Experience Back to Basics （页面存档备份，存于互联网档案馆）. Retrieved, December 27, 2009.

utoronto.ca (Global: 1,601^st place; Chinese: 1,468^th place)

oise.utoronto.ca

Schugurensky, Daniel. Self-governed, Sudbury Valley School begins in Massachusetts in History of Education: Selected Moments of the 20th Century. Ontario Institute for Studies in Education, 多倫多大學. 2003 [2009-08-31]. （原始内容存档于2009-08-30）.

web.archive.org (Global: 1^st place; Chinese: 1^st place)

The 2002 Collection （页面存档备份，存于互联网档案馆）, Sudbury Valley School Press, pp5-14
List of Sudbury Model schools. [2016-09-03]. （原始内容存档于2016-10-10）.
The Birth of a New Paradigm for Education （页面存档备份，存于互联网档案馆） by Dan Greenberg in The Sudbury Valley School Experience, 3rd ed. (Sudbury Valley School Press; Framingham, 1992), p. 81ff
Schugurensky, Daniel. Self-governed, Sudbury Valley School begins in Massachusetts in History of Education: Selected Moments of the 20th Century. Ontario Institute for Studies in Education, 多倫多大學. 2003 [2009-08-31]. （原始内容存档于2009-08-30）.
Greenberg, D. (1987) The Sudbury Valley School Experience Back to Basics （页面存档备份，存于互联网档案馆）. Retrieved, December 27, 2009.
Gee, James Paul (2003). "Games, not school, are teaching kids to think," （页面存档备份，存于互联网档案馆） High Score Education, Wired Magazine. Retrieved 2010-7-10.
John Taylor Gatto (2000-2003) The Underground History of American Education - A Schoolteacher's Intimate Investigation Into The Problem Of Modern Schooling, Chapter Three - Eyeless In Gaza, The Sudbury Valley School 互联网档案馆的存檔，存档日期2010-01-02.. Retrieved, December 27, 2009.
RAND Corporation. Early Progress: Interim Research on Personalized Learning (PDF) (pdf). Bill & Melinda Gates Foundation. 2014-11 [2016-09-03]. （原始内容 (PDF)存档于2016-09-10）.

wired.com (Global: 193^rd place; Chinese: 421^st place)

Gee, James Paul (2003). "Games, not school, are teaching kids to think," （页面存档备份，存于互联网档案馆） High Score Education, Wired Magazine. Retrieved 2010-7-10.

薩德伯里學校 (Chinese Wikipedia)

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ed.gov (Global: 576th place; Chinese: 1,959th place)

eric.ed.gov

gatesfoundation.org (Global: low place; Chinese: low place)

k12education.gatesfoundation.org

johntaylorgatto.com (Global: low place; Chinese: low place)

psichi.org (Global: low place; Chinese: low place)

psychologytoday.com (Global: 1,544th place; Chinese: 1,911th place)

sudburyschools.directory (Global: low place; Chinese: low place)

sudburyvalley.org (Global: low place; Chinese: low place)

bookstore.sudburyvalley.org

sudval.com (Global: low place; Chinese: low place)

utoronto.ca (Global: 1,601st place; Chinese: 1,468th place)

oise.utoronto.ca

web.archive.org (Global: 1st place; Chinese: 1st place)

wired.com (Global: 193rd place; Chinese: 421st place)

archive.org (Global: 6^th place; Chinese: 4^th place)

archive.today (Global: 14^th place; Chinese: 18^th place)

books.google.com (Global: 3^rd place; Chinese: 8^th place)

ed.gov (Global: 576^th place; Chinese: 1,959^th place)

psychologytoday.com (Global: 1,544^th place; Chinese: 1,911^th place)

utoronto.ca (Global: 1,601^st place; Chinese: 1,468^th place)

web.archive.org (Global: 1^st place; Chinese: 1^st place)

wired.com (Global: 193^rd place; Chinese: 421^st place)