Gaya APA

Locke, E, A., Latham, G, P. (1990). A Theory of goal setting and task performance . Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Locke, Edwin, A.., Latham, Garry, P.. "A Theory of goal setting and task performance". Englewood Cliffs, NJ: Prentice Hall, 1990. Text.