Whee Yen Wong and  Chan Wai Lee and  Kim Yeow Tshai,  A Review of Quality Relationship between IT Processes, IT Products and IT Services.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2012, vol. 72(12). 3452 - 3459
    [viewed 25 February 2020]. Available from: https://publications.waset.org/pdf/9590.