Cita APA (7a ed.)

Freeman, P. (1987). Software perspectives: The system in the message. Addison-Wesley.

Cita Chicago Style (17a ed.)

Freeman, Peter. Software Perspectives: The System in the Message. Wokingham [etc.]: Addison-Wesley, 1987.

Cita MLA (9a ed.)

Freeman, Peter. Software Perspectives: The System in the Message. Addison-Wesley, 1987.