Cita APA (7a ed.)

Harrison, M. (1995). Grammar Spectrum 2: Pre-intermediate. Oxford University Press.

Cita Chicago Style (17a ed.)

Harrison, Mark. Grammar Spectrum 2: Pre-intermediate. Oxford: Oxford University Press, 1995.

Cita MLA (9a ed.)

Harrison, Mark. Grammar Spectrum 2: Pre-intermediate. Oxford University Press, 1995.