Princeton Review (Firm). (2014). Grammar smart: A guide to perfect usage (Third edition, updated edition.). Penguin Random House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPrinceton Review (Firm). Grammar Smart: A Guide to Perfect Usage. Third edition, updated edition. New York: Penguin Random House, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPrinceton Review (Firm). Grammar Smart: A Guide to Perfect Usage. Third edition, updated edition. Penguin Random House, 2014.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.