APA
Dunckel J. &. T. B., . (2002). Keeping Customers Happy. : Jaico Books.
Chicago
Dunckel Jacaudine & Taylor Brian, . 2002. Keeping Customers Happy. : Jaico Books.
Harvard
Dunckel J. &. T. B., . (2002). Keeping Customers Happy. : Jaico Books.
MLA
Dunckel Jacaudine & Taylor Brian, . Keeping Customers Happy. : Jaico Books. 2002.