Johnson, A. (2007). Switching basics and intermediate routing: CCNA 3 labs and study guide. Cisco Press.
Chicago-viite (17. p.)Johnson, Allan. Switching Basics and Intermediate Routing: CCNA 3 Labs and Study Guide. Indianapolis: Cisco Press, 2007.
MLA-viite (9. p.)Johnson, Allan. Switching Basics and Intermediate Routing: CCNA 3 Labs and Study Guide. Cisco Press, 2007.
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