APA Style

Buttle, F., Maklan, S. (2009). Customer relationship management: concepts and technologies (2nd.ed). Amsterdam ; Boston: Elsevier/Butterworth-Heinemann.

MLA Style

Buttle, Francis.., Maklan, Stan.. "Customer relationship management: concepts and technologies". 2nd.ed Amsterdam ; Boston: Elsevier/Butterworth-Heinemann, 2009. Computer File.