“PREFACE.” Email Security: A Pocket Guide, by STEVEN FURNELL and PAUL DOWLAND, IT Governance Publishing, Ely, Cambridgeshire, 2010, pp. 5–5. JSTOR, www.jstor.org/stable/j.ctt5hh575.2. Accessed 27 May 2020.
FURNELL, S., & DOWLAND, P. (2010). PREFACE. In Email Security: A Pocket Guide (p. 5). Ely, Cambridgeshire: IT Governance Publishing. Retrieved May 27, 2020, from www.jstor.org/stable/j.ctt5hh575.2
FURNELL, STEVEN, and PAUL DOWLAND. "PREFACE." In Email Security: A Pocket Guide, 5. Ely, Cambridgeshire: IT Governance Publishing, 2010. Accessed May 27, 2020. www.jstor.org/stable/j.ctt5hh575.2.
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