PETERS GLEN. (1994). BENCHMARKING CUSTOMER SERVICE. PITMAN PUBLICATIONS.
Chicago-čujuhus (17. p.)PETERS GLEN. BENCHMARKING CUSTOMER SERVICE. LONDON: PITMAN PUBLICATIONS, 1994.
MLA-čujuhus (9. p.)PETERS GLEN. BENCHMARKING CUSTOMER SERVICE. PITMAN PUBLICATIONS, 1994.
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