Dyfyniad APA
Hinrichs, R. (1996). Energy: Its use and the environment (2nd ed.). Saunders College Pub..
Dyfyniad Arddull Chicago
Hinrichs, Roger. Energy: Its Use and the Environment. 2nd ed. Ft. Worth: Saunders College Pub., 1996.
Dyfyniad MLA
Hinrichs, Roger. Energy: Its Use and the Environment. 2nd ed. Saunders College Pub., 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.