Johnson, A. (2013). 31 Days Before Your CCENT Certification Exam: A Day-By-Day Review Guide for the ICND1 (100-101) Certification Exam, Second Edition. Cisco Press.
Cita Chicago Style (17a ed.)Johnson, Allan. 31 Days Before Your CCENT Certification Exam: A Day-By-Day Review Guide for the ICND1 (100-101) Certification Exam, Second Edition. [Place of publication not identified]: Cisco Press, 2013.
Cita MLA (8a ed.)Johnson, Allan. 31 Days Before Your CCENT Certification Exam: A Day-By-Day Review Guide for the ICND1 (100-101) Certification Exam, Second Edition. Cisco Press, 2013.
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