Cita APA (7a ed.)

Humby, E., & Robinson, P. (1971). Computers. Collier-Macmillan.

Cita Chicago Style (17a ed.)

Humby, Edward, y Philip Robinson. Computers. London: Collier-Macmillan, 1971.

Cita MLA (9a ed.)

Humby, Edward, y Philip Robinson. Computers. Collier-Macmillan, 1971.