Springer Cham, 2019
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Bijsterveld, Karin
Palgrave Macmillan London, 2019
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Ashby, Mike
Butterworth-Heinemann, 2014
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Nikolaidis, Efstratios
CRC Press, Taylor & Francis Group, 2011
Buku Teks SO
Elliott, John P.
Springer, 1999
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