APA (7th ed.) Citation

(1999). Cambridge Proficiency Examination Practice 6: University of Cambridge Local Examinations Syndicate. Cambridge, Cambridge University Press, 1999.

Chicago Style (17th ed.) Citation

Cambridge Proficiency Examination Practice 6: University of Cambridge Local Examinations Syndicate. Cambridge, Cambridge University Press, 1999, 1999.

MLA (9th ed.) Citation

Cambridge Proficiency Examination Practice 6: University of Cambridge Local Examinations Syndicate. Cambridge, Cambridge University Press, 1999, 1999.