Dyfyniad APA

Young, K. (1975). Geology: The paradox of earth and man. Houghton.

Dyfyniad Arddull Chicago

Young, Keith. Geology: The Paradox of Earth and Man. Boston: Houghton, 1975.

Dyfyniad MLA

Young, Keith. Geology: The Paradox of Earth and Man. Houghton, 1975.

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