Gaya APA

Bass, I., Lawton, B. (2009). Lean six sigma using sigmXL and minitab (1). United States of America: McGraw-Hill Companies,.

Gaya MLA

Bass, Issa., Lawton, Barbara. "Lean six sigma using sigmXL and minitab". 1 United States of America: McGraw-Hill Companies,, 2009. Text.