Cita APA (7th ed.)

Duffy, T., & Berchelmann, T. (1995). Computing concepts (2nd ed.). Wadsworth Pub. Co.

Cita Chicago (17th ed.)

Duffy, Tim, i Traci Berchelmann. Computing Concepts. 2nd ed. Belmont, Calif: Wadsworth Pub. Co, 1995.

Cita MLA (9th ed.)

Duffy, Tim, i Traci Berchelmann. Computing Concepts. 2nd ed. Wadsworth Pub. Co, 1995.