Cita APA (7a ed.)

Barfield, L. (1993). The user interface: Concepts and design (1st print. ed.). [S.n.].

Cita Chicago Style (17a ed.)

Barfield, Lon. The User Interface: Concepts and Design. 1st print. ed. Wokingham: [S.n.], 1993.

Cita MLA (9a ed.)

Barfield, Lon. The User Interface: Concepts and Design. 1st print. ed. [S.n.], 1993.