Cita APA (7a ed.)
Cisco Systems. CCNA: Cisco Certified Network Associate CertTrainer : Exam 640-507. McGraw-Hill.
Cita estilo Chicago (17a ed.)
Cisco Systems. CCNA: Cisco Certified Network Associate CertTrainer : Exam 640-507. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Cisco Systems. CCNA: Cisco Certified Network Associate CertTrainer : Exam 640-507. McGraw-Hill.
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