Christensen, Howard B.
Statistics step by step
Hoghton Mifflin, 1977
 Buku Teks SO
Sartika Kurniali
Step by step facebook
Gramedia, 2009
 Buku Teks SO
Richman, Larry
Project management step-by-step
American Management Association, 2002
 eBooks
McArdle, Geri
An eight-step change model: organization development
American Society for Training & Development, 2006
 eBooks
Jackson, Paul
Origami : a complete step-by-step guide
Chancellor, 1994
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