Sinaga, Harez Posma
2006
UI - Tesis Membership
Rizal Bachrun
Fakultas Psikologi Universitas Indonesia, 2006
UI - Tesis Membership
edited by William G. Emener, William S. Hutchison, Jr., Michael A. Richard
Thomas Books, 2003
Buku Teks
Sinaga, Harez Posma
2006
UI - Tesis Membership
Imam Soebechi
Universitas Indonesia, 2005
UI - Tesis Membership