Gall, Meredith D.
Prima Publishing, 1993
Buku Teks
Abuddin Nata, author
Kencana Prenada Media Group, 2011
Buku Teks
Burns, Tom, author
Sage Publications, 2003
Buku Teks
Imas Shidiq, author
Universitas Indonesia, 2000
UI - Tesis (Membership)
Abimanyu Takdir Alamsyah, author
2002
UI - Laporan Penelitian