Cita APA (7a ed.)

Riggs, J. L. (1982). Engineering economics (2nd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Riggs, James L. Engineering Economics. 2nd ed. New York: McGraw-Hill, 1982.

Cita MLA (9a ed.)

Riggs, James L. Engineering Economics. 2nd ed. McGraw-Hill, 1982.