Lowe, Nick
Away with wrinkles : a top dermatologist's secrets for a younger face
Kyle Cathie, 2005
 Buku Teks SO
Remley, Jim
Make million$ selling real estate: earning secrets of top agents
American Management Association, 2005
 eBooks
Qommi, Syekh Abbas
Miftah Al-Jannah : doa dan amalan pembuka pintu surga = Mafatij al-jinnan dan bawiyat al-shalihat / Syekh Abbas Qommi
Nur-Alhuda, 2013
 Buku Teks
Steel, Danielle
Secrets
Sphere Books, 1985
 Buku Teks SO
Fira Basuki
Pintu
Gramedia Widiasarana Indonesia, 2002
 Buku Teks SO