(1996). Headway immediate (Student's book and workbook). Thanh Hóa: Nxb. Thanh Hóa.
Chicago Style aipamenaHeadway Immediate (Student's Book and Workbook). Thanh Hóa: Nxb. Thanh Hóa, 1996.
MLA aipamenaHeadway Immediate (Student's Book and Workbook). Thanh Hóa: Nxb. Thanh Hóa, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.