(1990). CCNP practical studies troubleshooting. [S.l.]: [s.n.].
Trích dẫn kiểu ChicagoCCNP Practical Studies Troubleshooting. [S.l.]: [s.n.], 1990.
MLA引文CCNP Practical Studies Troubleshooting. [S.l.]: [s.n.], 1990.
警告：這些引文格式不一定是100％准確.
APA引文