Frank R. Noyes, editor
[Springer, ], 2012
eBooks
Zulkarnain, author
Universitas Sumatera Utara. Faculty of Psychology, 2015
Artikel Jurnal
Zulkarnain, author
Universitas Sumatera Utara. Faculty of Psychology, 2015
Artikel Jurnal
Kharisma Priyo Nugroho, author
2002
UI - Tesis Membership
edited by Freddie H. Fu, Steven B. Cohen
Slack Incorporated, 2008
Buku Teks