FRIEDMAN N J. (1995). TELEPHONE SKILLS FROM A TO Z. CRISP PUBLICATION.
Chicago-čujuhus (17. p.)FRIEDMAN N J. TELEPHONE SKILLS FROM A TO Z. CALIFORNIA: CRISP PUBLICATION, 1995.
MLA-čujuhus (9. p.)FRIEDMAN N J. TELEPHONE SKILLS FROM A TO Z. CRISP PUBLICATION, 1995.
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