Lua APA (7ú heag.)

NIEBEL, B. W. (1993). Motion And Time Study. Irwin.

Lua i Stíl Chicago (17ú heag.)

NIEBEL, Benjamin W. Motion And Time Study. Irwin, 1993.

Lua MLA (8ú heag.)

NIEBEL, Benjamin W. Motion And Time Study. Irwin, 1993.

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