“Front Matter.” Penetration Testing Services Procurement Guide, by CREST, IT Governance Publishing, Cambridgeshire, United Kingdom, 2014, pp. 1–5. JSTOR, www.jstor.org/stable/j.ctt155j44d.1. Accessed 24 July 2021.
CREST. (2014). Front Matter. In Penetration Testing Services Procurement Guide (pp. 1-5). Cambridgeshire, United Kingdom: IT Governance Publishing. Retrieved July 24, 2021, from http://www.jstor.org/stable/j.ctt155j44d.1
CREST. "Front Matter." In Penetration Testing Services Procurement Guide, 1-5. Cambridgeshire, United Kingdom: IT Governance Publishing, 2014. Accessed July 24, 2021. http://www.jstor.org/stable/j.ctt155j44d.1.
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