Princeton Review (Firm). (2014). Grammar smart: A guide to perfect usage (Third edition, updated edition.). Penguin Random House.
Cita Chicago Style (17a ed.)Princeton Review (Firm). Grammar Smart: A Guide to Perfect Usage. Third edition, updated edition. New York: Penguin Random House, 2014.
Cita MLA (8a ed.)Princeton Review (Firm). Grammar Smart: A Guide to Perfect Usage. Third edition, updated edition. Penguin Random House, 2014.
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