Shurter, R. (1982). Effective letters in business. Tata Mc Graw Hill.
Chicago-čujuhus (17. p.)Shurter, Robert. Effective Letters in Business. New Delhi: Tata Mc Graw Hill, 1982.
MLA-čujuhus (9. p.)Shurter, Robert. Effective Letters in Business. Tata Mc Graw Hill, 1982.
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