Doxiadis, C. A.
The human settlements that we need
Tata McGraw-Hill, 1976
Buku Teks
Batten,T.R.
The human factor in youth work / T.R. Batten eith the collaboration of Madge Batten
Oxford University Press , 1970
Buku Teks
Lakin, Martin
Interpersonaal encounter: theory and practice in sensitivity training / Martin Lakin
McGraw-Hill, 1972
Buku Teks
The 1973
annual handbook for group facilitators / Edited by John E. Jones and J. William Pfeiffer
University Associates, 1973
Buku Teks
The 1974
annual handbook for group facilitators / Edited by J. William Pfeiffer and John E. Jones
University Associates, 1974
Buku Teks