Cita APA (7th ed.)

WIERSEMA FRED. (1998). CUSTOMER SERVICE. HARPER COLLINS PUBLISHERS.

Cita Chicago (17th ed.)

WIERSEMA FRED. CUSTOMER SERVICE. NEW YORK: HARPER COLLINS PUBLISHERS, 1998.

Cita MLA (9th ed.)

WIERSEMA FRED. CUSTOMER SERVICE. HARPER COLLINS PUBLISHERS, 1998.