Lua APA (7ú heag.)

Riggs, J. L. (1982). Essentials of engineering economics. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Riggs, James L. Essentials of Engineering Economics. New York: McGraw-Hill, 1982.

Lua MLA (9ú heag.)

Riggs, James L. Essentials of Engineering Economics. McGraw-Hill, 1982.

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