MUNDEL, M. E. (1981). Motion and time study: Improving production.-- Ed.5. Prentice Hall Of India.
Lua i Stíl Chicago (17ú heag.)MUNDEL, Marvin E. Motion and Time Study: Improving Production.-- Ed.5. New Delhi: Prentice Hall Of India, 1981.
Lua MLA (9ú heag.)MUNDEL, Marvin E. Motion and Time Study: Improving Production.-- Ed.5. Prentice Hall Of India, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.