Gaya APA

Evans, J, R., Lindsay, W, M. (2007). An Introduction To Six Sigma & Process Improvement : Pengantar Six Sigma (Jilid 1). Jakarta: Salemba Empat.

Gaya MLA

Evans, James, R., Lindsay, William, M. "An Introduction To Six Sigma & Process Improvement : Pengantar Six Sigma". Jilid 1 Jakarta: Salemba Empat, 2007. Text.