APA引文

Heldman, R. K. (1993). Future telecommunications: Information applications, services & infrastructure. Washington, D.C: McGraw-Hill.

Trích dẫn kiểu Chicago

Heldman, Robert K. Future Telecommunications: Information Applications, Services & Infrastructure. Washington, D.C: McGraw-Hill, 1993.

MLA引文

Heldman, Robert K. Future Telecommunications: Information Applications, Services & Infrastructure. Washington, D.C: McGraw-Hill, 1993.

警告：这些引文格式不一定是100％准确.