Battle, J.A.
The new idea in education / J.A. Battle and Robert L. Shannon
Harper & Row , 1968
 Buku Teks
Studies in education from the department of education of The State University of Iowa / Frederick Elmer Bolton, editor
The University , Iowa City, 1912
 Buku Klasik
Tooley, James
Reclaiming education
Continuum Studies Education Policy, 2000
 Buku Teks
Smith, L. Glenn
Myth and reality : readings in education
Allyn and Bacon, 1973
 Buku Teks
Williams, Gareth
Independent further education
PSI, [date of publication not identified]
 Buku Teks