Linsenman, Ciree
Start your own lawn care or landscaping business : your step-by-step guide to success
Ep. Entrepreneur Press, 2011
 Buku Teks SO
Skrob, Robert
Start your own information marketing business: Your step-by-step guide to success
Entrepeneur Press, 2013
 Buku Teks SO
Start your own personal concierge service : your step-by-step guide to success
Entrepreneur Press, Ciree Linsenman
Entepreneur Press, 2011
 Buku Teks SO
Phillips, Patricia Pulliam
Measuring the success of coaching: a step-by-step guide for measuring impact and calculating ROI
American Society for Training & Development, 2012
 eBooks
Cotsakos, Christos M.
It's your money: the E*trade step-by-step guide to online investing
Harper Business, 2000
 Buku Teks SO