Heller, R. (2022). Essential Managers - Selling successfully= Cẩm nang quản lý hiệu quả - Kinh doanh hiệu quả.
শিকাগো স্টাইলে সাইটেশনHeller, R. Essential Managers - Selling Successfully= Cẩm Nang Quản Lý Hiệu Quả - Kinh Doanh Hiệu Quả. 2022.
এমএলএ সাইটেশনHeller, R. Essential Managers - Selling Successfully= Cẩm Nang Quản Lý Hiệu Quả - Kinh Doanh Hiệu Quả. 2022.
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