Gaya APA

Niebel, B, W., Freivalds, A. (2003). Methods, standars, and work design (11th ed). Boston: McGraw-Hill.

Gaya MLA

Niebel, Benjamin, W.., Freivalds, Andris. "Methods, standars, and work design". 11th ed Boston: McGraw-Hill, 2003. Text.