APA aipamena

Không rõ. (1997). Cambridge proficiency examination practice 3: University of Cambridge local examinations syndicate. TP Hồ Chí Minh.

Chicago Style aipamena

Không rõ. Cambridge Proficiency Examination Practice 3: University of Cambridge Local Examinations Syndicate. TP Hồ Chí Minh, 1997.

MLA aipamena

Không rõ. Cambridge Proficiency Examination Practice 3: University of Cambridge Local Examinations Syndicate. TP Hồ Chí Minh, 1997.

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