APA-viite (7. p.)

Johnson, A. (2007). Routers and routing basics: CCNA 2 labs and study guide. Cisco Press.

Chicago-viite (17. p.)

Johnson, Allan. Routers and Routing Basics: CCNA 2 Labs and Study Guide. Indianapolis, Ind: Cisco Press, 2007.

MLA-viite (9. p.)

Johnson, Allan. Routers and Routing Basics: CCNA 2 Labs and Study Guide. Cisco Press, 2007.