Gaya APA

Denhardt, R, B., Grubbs, J, W. (1999). Public Administration : An Action Orientation (3rd.ed). USA: Harcourt College Publishers.

Gaya MLA

Denhardt, Robert, B.., Grubbs, Joseph, W.. "Public Administration : An Action Orientation". 3rd.ed USA: Harcourt College Publishers, 1999. Text.