एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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