Boissoneau, Robert
An Aspen Publ., 1980
Buku Teks
Davis, Gary A., author
Pearson, 2014
Buku Teks
Illich, Ivan
Pustaka Sinar Harapan, 1984
Buku Teks
Burton R. Clark, Guy R. Neave, editors-in-chief
Pergamon Press, 1992
Buku Referensi
Apps, Jerold W., author
Jossey-Bass Publishers, 1985
Buku Teks