Wat Ploysri,  The Analysis of Printing Quality of Offset -  Printing Ink with Coconut Oil Base.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2014, vol. 93(9). 906 - 909
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/9999184.