MacGregor, Sandy
Students steps to success : 7 langkah menuju sukses = students steps to success
Hikmah, 2007
 Buku Teks SO
Onwuegbuzie, Anthony
7 steps to a comprehensive literature review : a multimodal & cultural approach
SAGE, 2016
 Buku Teks SO
Breithaupt, Tim
10 steps to sales success: the proven system that can shorten the selling cycle, double your close ratio, and significantly increase your income
American Management Association, 2003
 eBooks
Walker, Peter
In the steps of Jesus
Kanisius, 2010
 Buku Referensi
Ziglar, Zig
Steps to the top
Heinemann Asia, 1995
 Buku Teks SO