Cita APA (7a ed.)

Barfield, L. (1993). The user interface: Concepts & design. Addison-Wesley.

Cita Chicago Style (17a ed.)

Barfield, Lon. The User Interface: Concepts & Design. Wokingham [etc.]: Addison-Wesley, 1993.

Cita MLA (9a ed.)

Barfield, Lon. The User Interface: Concepts & Design. Addison-Wesley, 1993.