APA aipamena

Andris Freivalds. (2008). Niebel's methods, standards & work design. McGraw-Hill.

Chicago Style aipamena

Andris Freivalds. Niebel's Methods, Standards & Work Design. McGraw-Hill, 2008.

MLA aipamena

Andris Freivalds. Niebel's Methods, Standards & Work Design. McGraw-Hill, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.