APA

DeGarmo E. P., Bontadelli J. A. & Sullivan W. G. (1989). Engineering economy. : \Collier Macmillan.

Chicago

DeGarmo E Paul, Bontadelli James A and Sullivan William G. 1989. Engineering economy. : \Collier Macmillan.

Harvard

DeGarmo E. P., Bontadelli J. A. and Sullivan W. G. (1989). Engineering economy. : \Collier Macmillan.

MLA

DeGarmo E Paul, Bontadelli James A and Sullivan William G. Engineering economy. : \Collier Macmillan. 1989.