Cita APA (7th ed.)

O'BRIEN, J. A. (1986). Computers and information processing: With software tu-torial and basic.-- Ed.2. Richard D. Irwin.

Cita Chicago (17th ed.)

O'BRIEN, James A. Computers and Information Processing: With Software Tu-torial and Basic.-- Ed.2. Illinois: Richard D. Irwin, 1986.

Cita MLA (9th ed.)

O'BRIEN, James A. Computers and Information Processing: With Software Tu-torial and Basic.-- Ed.2. Richard D. Irwin, 1986.