MUNDEL, M. E. (1994). Motion And Time Study Improving Productivity Marvin E. Mundel, David L. Danner. Prentice-Hall International.
Lua i Stíl Chicago (17ú heag.)MUNDEL, Marvin E. Motion And Time Study Improving Productivity Marvin E. Mundel, David L. Danner. Prentice-Hall International, 1994.
Lua MLA (8ú heag.)MUNDEL, Marvin E. Motion And Time Study Improving Productivity Marvin E. Mundel, David L. Danner. Prentice-Hall International, 1994.
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