Mary Jones; Diane Fellowes-Freeman; David Sang. (2012). Cambridge Checkpoint Science Workbook 8 (Cambridge International Examinations) (Workbook.). CAMBRIDGE UNIVERSITY PRESS.
Chicago-viite (17. p.)Mary Jones; Diane Fellowes-Freeman; David Sang. Cambridge Checkpoint Science Workbook 8 (Cambridge International Examinations). Workbook. CAMBRIDGE UNIVERSITY PRESS, 2012.
MLA-viite (9. p.)Mary Jones; Diane Fellowes-Freeman; David Sang. Cambridge Checkpoint Science Workbook 8 (Cambridge International Examinations). Workbook. CAMBRIDGE UNIVERSITY PRESS, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.