Gaya APA

Freivalds, A., Niebel, B, W. (2009). Niebel's methods, standards, and work design . New York: McGraw-Hill.

Gaya MLA

Freivalds, Andris., Niebel, Benjamin, W.. "Niebel's methods, standards, and work design". New York: McGraw-Hill, 2009. Teks.