Membangun tim yang benar-benar mampu bekerja=Successful team building / John Davis, Peter Millburn, Terry Murphy, and Martin Woodhouse

Managing human relations: concept and practices

Hubungan kepuasan komunikasi call center dengan efektifitas komunikasi kepada customer Garuda Indonesia = Call center's communication satisfaction in relation with communication effectiveness to Garuda Indonesia's customer

Customer relationship management: concepts and technologies

Customer genius : becoming a customer-centric business