The human factor in youth work / T.R. Batten eith the collaboration of Madge Batten
Oxford University Press , 1970
 Buku Teks
Zimmerman, Constance
Asserting yourself at work
[American Management Association;, ], 2010
Doxiadis, C. A.
The human settlements that we need
Tata McGraw-Hill, 1976
 Buku Teks
A Handbook of structured experiences for human relations training
edited by J. William Pfeiffer and John E. Jones
University Associates, 1985
 Buku Teks
Pfeiffer, J. William
Reference guide to handbooks and annuals: 1985 edition. vol. I-X and '72-85 annuals / J. William Pfeiffer
University Associates, 1985
 Buku Teks