Cita APA (7a ed.)
Harrison, M. (1995). Grammar spectrum 2. English rules and practice: Pre-intermadiate. With answers. Oxford University Press.
Cita Chicago Style (17a ed.)
Harrison, Mark. Grammar Spectrum 2. English Rules and Practice: Pre-intermadiate. With Answers. Oxford: Oxford University Press, 1995.
Cita MLA (9a ed.)
Harrison, Mark. Grammar Spectrum 2. English Rules and Practice: Pre-intermadiate. With Answers. Oxford University Press, 1995.
Precaución: Estas citas no son 100% exactas.