Nugent, Frank A.
Merrill , 1990
Buku Teks
Dadang Hawari, author
Badan Penerbit FKUI, 2014
Buku Teks
McLeod, John, author
Kencana, 2003
Buku Teks
Cintavhati Poerwoto, author
Universitas Indonesia, 1994
UI - Makalah dan Kertas Kerja
Hackney, Harold
Allyn and Bacon, 1991
Buku Teks