APA
Allen D. R., . (2005). Customer satisfaction research management. Person Education (Singapore) Pvt Ltd, India: .
Chicago
Allen Derek R, . 2005. Customer satisfaction research management. Person Education (Singapore) Pvt Ltd, India: .
Harvard
Allen D. R., . (2005). Customer satisfaction research management. Person Education (Singapore) Pvt Ltd, India: .
MLA
Allen Derek R, . Customer satisfaction research management. Person Education (Singapore) Pvt Ltd, India: . 2005.