Cita APA (7a ed.)

Pettigrew, M., & Elliott, D. (1999). Student it skills. Gower.

Cita Chicago Style (17a ed.)

Pettigrew, Mark, y David Elliott. Student It Skills. Aldershot [etc.]: Gower, 1999.

Cita MLA (9a ed.)

Pettigrew, Mark, y David Elliott. Student It Skills. Gower, 1999.