MLA

Hopper, Dennis, Dennis Hopper, and Denis Hopper. Achieving Business Excellence Quality & Performance Improvement. Thorogood Publishing, 1997.

APA

Hopper, D., Hopper, D.Hopper, D. (1997). Achieving Business Excellence Quality & Performance Improvement. Thorogood Publishing.

Chicago

Hopper, Dennis, Dennis Hopper, and Denis Hopper. Achieving Business Excellence Quality & Performance Improvement. : Thorogood Publishing, 1997.