(美)Todd Lammle著. (2001). CCNA: Cisco Certified Network Associate学习指南：英文原版. 电子工业出版社.
Dyfyniad Arddull Chicago(美)Todd Lammle著. CCNA: Cisco Certified Network Associate学习指南：英文原版. 电子工业出版社, 2001.
Dyfyniad MLA(美)Todd Lammle著. CCNA: Cisco Certified Network Associate学习指南：英文原版. 电子工业出版社, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.