Dyfyniad APA
Panneerselvam, R. (2013). Engineering economics. Phi Learning.
Dyfyniad Arddull Chicago
Panneerselvam, R. Engineering Economics. New Delhi: Phi Learning, 2013.
Dyfyniad MLA
Panneerselvam, R. Engineering Economics. Phi Learning, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.