Hutchinson, T., & Hồng Đức (d. & gt). (2011). Life lines pre - intermediate: Student's book - work book. H: Văn hóa Thông Tin.
Chicago-tyylinen lähdeviittausHutchinson, Tom, ja Hồng Đức (d. & gt). Life Lines Pre - Intermediate: Student's Book - Work Book. H: Văn hóa Thông Tin, 2011.
MLA-viiteHutchinson, Tom, ja Hồng Đức (d. & gt). Life Lines Pre - Intermediate: Student's Book - Work Book. H: Văn hóa Thông Tin, 2011.
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