Mary Jones; Diane Fellowes-Freeman; David Sang. (2012). Cambridge Checkpoint Science Workbook 8 (Cambridge International Examinations) (Workbook.). CAMBRIDGE UNIVERSITY PRESS.

Mary Jones; Diane Fellowes-Freeman; David Sang. Cambridge Checkpoint Science Workbook 8 (Cambridge International Examinations). Workbook. CAMBRIDGE UNIVERSITY PRESS, 2012.

Mary Jones; Diane Fellowes-Freeman; David Sang. Cambridge Checkpoint Science Workbook 8 (Cambridge International Examinations). Workbook. CAMBRIDGE UNIVERSITY PRESS, 2012.