Dyfyniad APA

Kemp, R. (1980). Pollution: Pupil`s book. Edward Arnold.

Dyfyniad Arddull Chicago

Kemp, Richard. Pollution: Pupil`s Book. London: Edward Arnold, 1980.

Dyfyniad MLA

Kemp, Richard. Pollution: Pupil`s Book. Edward Arnold, 1980.

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