APA aipamena

ROBERT W. Lucas, & John E. Biernat. (2005). Customer Service: Building succesful skils for the twenty-first century. New York: McGraw-Hill.

Chicago Style aipamena

ROBERT W. Lucas, and John E. Biernat. Customer Service: Building Succesful Skils for the Twenty-first Century. New York: McGraw-Hill, 2005.

MLA aipamena

ROBERT W. Lucas, and John E. Biernat. Customer Service: Building Succesful Skils for the Twenty-first Century. New York: McGraw-Hill, 2005.