Dyfyniad APA

Roeder, J. L. (1980). Energy for the future (2nd ed.). [Calhoun School Science Dept.].

Dyfyniad Arddull Chicago

Roeder, John L. Energy for the Future. 2nd ed. New York: [Calhoun School Science Dept.], 1980.

Dyfyniad MLA

Roeder, John L. Energy for the Future. 2nd ed. [Calhoun School Science Dept.], 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.