Winning sales letters / Dianna Booher The Mcgraw-Hill handbook of business letters / Roy W. Poe Buku komplet panduan surat-surat bisnis / Michael Muckian, John Woods ; Alih bahasa, Imam Khoiri Speak with confidence : presentansi luar biasa yang informatif, inspirasional, dan penuh daya bujuk / Dianna Booher, alih bahasa, Bambang Soemantri ; editor, Susi Aprilyana The Complete handbook of model business letters / Jack Griffin Everyday letters for busy people / Debra Hart May, Regina McAloneyThe McGraw-Hill handbook of business letters / Roy W.PoeHandbook of more business letters / Ann Poe ; pengalih bahasa, Nestri Windarti ; penyunting, Padjar Pudji YuliantoThe McGraw-Hill handbook of business letters /Roy W. PoeThe McGraw-Hill handbook of business letters / Roy W.Poe