Dyfyniad APA

Williams,martin, chappell,john, deckker,patrick de, dunkerley,david, & kershaw,peter. (1993). Quaternary environments. Hodder headline group.

Dyfyniad Arddull Chicago

Williams,martin, chappell,john, deckker,patrick de, dunkerley,david, and kershaw,peter. Quaternary Environments. London: Hodder headline group, 1993.

Dyfyniad MLA

Williams,martin, et al. Quaternary Environments. Hodder headline group, 1993.

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