Cita APA (7a ed.)

Lawday, C., & Shipton, P. (1998). I-spy: Course book 3. Oxford University.

Cita Chicago Style (17a ed.)

Lawday, Cathy, y Paul Shipton. I-spy: Course Book 3. Oxford: Oxford University, 1998.

Cita MLA (8a ed.)

Lawday, Cathy, y Paul Shipton. I-spy: Course Book 3. Oxford University, 1998.