De Belen, R. T., & De Belen, A. R. V. (2019). Business & technical writing. Jobal Publishing, Inc.
Chicago Style aipamenaDe Belen, Rustico T., and Arthur Reiner V. De Belen. Business & Technical Writing. Quezon City: Jobal Publishing, Inc, 2019.
MLA aipamenaDe Belen, Rustico T., and Arthur Reiner V. De Belen. Business & Technical Writing. Jobal Publishing, Inc, 2019.
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