Plunkett, W. R., & Attner, R. F. (1997). Management: Meeting and exceeding customer expectations (6th ed.). South-Western College Pub..
Lua i Stíl Chicago (17ú heag.)Plunkett, W. Richard, agus Raymond F. Attner. Management: Meeting and Exceeding Customer Expectations. 6th ed. Cincinnati: South-Western College Pub., 1997.
Lua MLA (8ú heag.)Plunkett, W. Richard, agus Raymond F. Attner. Management: Meeting and Exceeding Customer Expectations. 6th ed. South-Western College Pub., 1997.
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