Andris Freivalds. (2008). Niebel's methods, standards & work design. McGraw-Hill.
シカゴスタイル引用形Andris Freivalds. Niebel's Methods, Standards & Work Design. McGraw-Hill, 2008.
MLA引用形式Andris Freivalds. Niebel's Methods, Standards & Work Design. McGraw-Hill, 2008.
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