In action: measuring ROI in the public sector
edited by Jack J. Phillips and Patricia Pulliam Phillips
ASTD Press, 2002
 eBooks
Linsenman, Ciree
Start your own lawn care or landscaping business : your step-by-step guide to success
Ep. Entrepreneur Press, 2011
 Buku Teks SO
Start your own medical claims billing service : your step-by-step guide to success
Charlene Davis
Entrepreneur Press, 2012
 Buku Teks
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