APA引文

Không rõ. (1999). Electronic Communication Techniques. NOTNXB.

Trích dẫn kiểu Chicago

Không rõ. Electronic Communication Techniques. NOTNXB, 1999.

MLA引文

Không rõ. Electronic Communication Techniques. NOTNXB, 1999.

警告：这些引文格式不一定是100％准确.