Gaya APA
Barnes, R, M. (1980).
Motion And Time Study Design And Measurement Of Work Seventh Edition (Sevent Edition).
CANADA:
Jhon Wiley and Sons.
Gaya MLA
Barnes, Ralph, M.
"Motion And Time Study Design And Measurement Of Work Seventh Edition".
Sevent Edition
CANADA:
Jhon Wiley and Sons,
1980.
Text.