Cita APA (7a ed.)

Johnson, A. (2025). 31 days before your CCNA exam: A day-by-day review guide for the CCNA 200-301 certification exam (Second edition.). Cisco Press.

Cita Chicago Style (17a ed.)

Johnson, Allan. 31 Days Before Your CCNA Exam: A Day-by-day Review Guide for the CCNA 200-301 Certification Exam. Second edition. Hoboken, NJ: Cisco Press, 2025.

Cita MLA (9a ed.)

Johnson, Allan. 31 Days Before Your CCNA Exam: A Day-by-day Review Guide for the CCNA 200-301 Certification Exam. Second edition. Cisco Press, 2025.