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J. Lewis, W. Loftus, and A. Smith, Java software solutions: foundations of program design, Ninth edition, Global edition. Harlow, Essex: Pearson Education Limited, 2018 [Online]. Available: https://ebookcentral.proquest.com/lib/uea/detail.action?docID=5573666
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R. Simmons, Hardcore Java, 1st ed. Sebastopol, CA: O’Reilly [Online]. Available: https://learning.oreilly.com/library/view/hardcore-java/0596005687/?ar=
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S. P. Harbison and G. L. Steele, C, a reference manual, 5th ed. Upper Saddle River, N.J.: Prentice Hall, 2002.
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C programming language. Createspace Independent Publishing Platform, 2016.