“…By reviewing the literature, there is quite a lot of authors who wrote about CSFs in CRM implementation, comparing some literatures as what written by Wilson et al (2002), Chen and Ching (2004), Boon et al (2005), King and Burgess (2008), Almotairi (2009), Askool and Nakata (2010), Tongmee and Punnakitidashem (2010), Monem et al (2011), Garcia et al (2012) and Garrido-Moreno and Lockett (2012). Nevertheless, the number of compared papers among all only ranges between 4 to 22 papers.…”