Whelan, J., Husnizam Hussain, & Shahrazi Hasan. (2003). E-mel @ kerja: Panduan berguna mengendalikan e-mel anda. Prentice Hall.
Chicago Style (17th ed.) CitationWhelan, Jonathan, Husnizam Hussain, and Shahrazi Hasan. E-mel @ Kerja: Panduan Berguna Mengendalikan E-mel Anda. London: Prentice Hall, 2003.
MLA (8th ed.) CitationWhelan, Jonathan, et al. E-mel @ Kerja: Panduan Berguna Mengendalikan E-mel Anda. Prentice Hall, 2003.
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