Muhammad Muhyidin, author
Tunas Publishing, 2006
Buku Teks
Syahmuharnis
Republika, 2006
Buku Teks
Rachmat Taufiq, author
Fakultas Psikologi Universitas Indonesia, 2007
UI - Skripsi (Membership)
Ary Ginanjar Agustian , author
Arga, 2005
Buku Teks
Muhammad Djarot Sensa, author
Mizan, 2005
Buku Teks