Dyfyniad APA

Bradshaw, M. J., & Abbott, A. J. (1978). Earth's changing surface. Hodder and stoughton.

Dyfyniad Arddull Chicago

Bradshaw, Michael J., and A. J. Abbott. Earth's Changing Surface. London: Hodder and stoughton, 1978.

Dyfyniad MLA

Bradshaw, Michael J., and A. J. Abbott. Earth's Changing Surface. Hodder and stoughton, 1978.

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