Greg Byrd; Lynn Byrd; Chris Pearce. (2012). Cambridge Checkpoint Mathematics Coursebook 7 (Cambridge International Examinations). CAMBRIDGE UNIVERSITY PRESS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreg Byrd; Lynn Byrd; Chris Pearce. Cambridge Checkpoint Mathematics Coursebook 7 (Cambridge International Examinations). CAMBRIDGE UNIVERSITY PRESS, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGreg Byrd; Lynn Byrd; Chris Pearce. Cambridge Checkpoint Mathematics Coursebook 7 (Cambridge International Examinations). CAMBRIDGE UNIVERSITY PRESS, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.