Lua APA (7ú heag.)

Bergman, B., & Klefsjö, B. (1994). Quality: From customer needs to customer satisfaction. McGraw-Hill Book Co.

Lua i Stíl Chicago (17ú heag.)

Bergman, Bo, agus Bengt Klefsjö. Quality: From Customer Needs to Customer Satisfaction. London ; New York: McGraw-Hill Book Co, 1994.

Lua MLA (8ú heag.)

Bergman, Bo, agus Bengt Klefsjö. Quality: From Customer Needs to Customer Satisfaction. McGraw-Hill Book Co, 1994.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.