Ackert, P. (2000). Facts and figures: Basic reading practice. Tp. Hồ Chí Minh: Trẻ.
Chicago Style aipamenaAckert, Patricia. Facts and Figures: Basic Reading Practice. Tp. Hồ Chí Minh: Trẻ, 2000.
MLA aipamenaAckert, Patricia. Facts and Figures: Basic Reading Practice. Tp. Hồ Chí Minh: Trẻ, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.