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Ex: Text 
Format: [reference no, p. pagenumber]
Ex.: Text [1, p. 74].
Format: [Reference no.] A. A. Author, Title of the book, xth ed. City: Publisher, year.
Ex.:  J. D. Cressler, Silicon earth: introduction to microelectronics and nanotechnology, 2nd ed. Boca Raton, USA: CRC Press, 2016.
Format e-book: [referansenr] A. A. Title of the book, xth ed. City: Publisher, year. [Online]. Available: DOI (or URL)
Ex.:  W. Stallings, Cryptography and Network Security: Principles and Practice, Intern. ed. Boston, Mass.: Pearson education, 2013. [Online]. Available: https://www-dawsonera-com.ezproxy.uis.no/abstract/9780273793762
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