Thuỳ Chi. (2002). Mẫu thư kinh doanh thương mại = Business letters. H: VHTT.
শিকাগো স্টাইলে সাইটেশনThuỳ Chi. Mẫu Thư Kinh Doanh Thương Mại = Business Letters. H: VHTT, 2002.
এমএলএ সাইটেশনThuỳ Chi. Mẫu Thư Kinh Doanh Thương Mại = Business Letters. H: VHTT, 2002.
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