stevenson, w. j. (2014). operations management (12th. ed.). mcgraw- hill education.
Lua i Stíl Chicago (17ú heag.)stevenson, william j. Operations Management. 12th. ed. british: mcgraw- hill education, 2014.
Lua MLA (9ú heag.)stevenson, william j. Operations Management. 12th. ed. mcgraw- hill education, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.