Gerdake, George
Al Imam Ali : suara keadilan dan perikemanusiaan di indonesiakan oleh H.M. Asad Shahab
Pusaka , [Date of publication not identified]
 Buku Teks SO
Maxwell, John C.
Good leaders ask great quetions
Menuju Insan Cemerlang (MIC), 2015
 Buku Teks SO
Leaders
Leaders Magazine,
 Majalah, Jurnal, Buletin
Adair, John
Membina calon pimpinan: (sepuluh prinsip pokok)
Bumi Aksara , 1993
 Buku Teks SO
Zakiyuddin Baidhawy
Konsep jihad dan mujahid damai = the concept of jihad and mujahid of peace
Kementerian Agama RI, 2012
 Buku Teks SO