APA引文

(1990). CCNP practical studies troubleshooting. [S.l.]: [s.n.].

Trích dẫn kiểu Chicago

CCNP Practical Studies Troubleshooting. [S.l.]: [s.n.], 1990.

MLA引文

CCNP Practical Studies Troubleshooting. [S.l.]: [s.n.], 1990.

警告：这些引文格式不一定是100％准确.