Johnson, A. (2007). Switching basics and intermediate routing: CCNA 3 labs and study guide. Cisco Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, Allan. Switching Basics and Intermediate Routing: CCNA 3 Labs and Study Guide. Indianapolis: Cisco Press, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohnson, Allan. Switching Basics and Intermediate Routing: CCNA 3 Labs and Study Guide. Cisco Press, 2007.
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