Cita APA (7th ed.)

NIEBEL, B. W. (1988). Motion and time study. IRWIN.

Cita Chicago (17th ed.)

NIEBEL, Benjamin W. Motion and Time Study. Homewood: IRWIN, 1988.

Cita MLA (9th ed.)

NIEBEL, Benjamin W. Motion and Time Study. IRWIN, 1988.