Baker, A., & Hồng Đức. (2009). Ship or sheep?: An intermediate pronunciation course : Dùng kèm đĩa CD. Đồng Nai: Nxb. Đồng Nai.
Παραπομπή Chicago StyleBaker, Ann, και Hồng Đức. Ship or Sheep?: An Intermediate Pronunciation Course : Dùng Kèm đĩa CD. Đồng Nai: Nxb. Đồng Nai, 2009.
Παραπομπή MLABaker, Ann, και Hồng Đức. Ship or Sheep?: An Intermediate Pronunciation Course : Dùng Kèm đĩa CD. Đồng Nai: Nxb. Đồng Nai, 2009.
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