Howe, Reuel L.
The miracle of dialogue / Reuel L. Howe
Seabury Press, 1963
 Buku Teks SO
Hackney, Harold
Counseling strategies and interventions / Harold Hackney and L. Sherilyn Cormier
Allyn and Bacon, 1991
 Buku Teks
Cortright, Rupert L.
Creative discussion Rupert L. Cortright and George L. Hinds
Macmillan, 1959
 Buku Teks
Kajian lapangan perkerasan jalan beton pracetak di Indonesia
 Artikel Jurnal
Play therapy : dynamics of the process of counseling with children/ edited by: Garry L. Landreth
Charles C. Thomas Publishers, 1982
 Buku Teks
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