Lammle, T. (2005). CCNA: Cisco Certified Network Associate. America: Wiley.
Trích dẫn kiểu ChicagoLammle, Todd. CCNA: Cisco Certified Network Associate. America: Wiley, 2005.
Deismireacht MLALammle, Todd. CCNA: Cisco Certified Network Associate. America: Wiley, 2005.
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