Styl cytowania APA

Không rõ. (2003). Cambridge first certificate examination practice 1: University of Cambridge Local Examinations Syndicate. TP Hồ Chí Minh.

Styl cytowania Chicago

Không rõ. Cambridge First Certificate Examination Practice 1: University of Cambridge Local Examinations Syndicate. TP Hồ Chí Minh, 2003.

Styl cytowania MLA

Không rõ. Cambridge First Certificate Examination Practice 1: University of Cambridge Local Examinations Syndicate. TP Hồ Chí Minh, 2003.

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