Dyfyniad APA

KERROD , R. ALL ABOUT VOLCANOES: WORLD GREAT SCIENTIST SERIES.

Dyfyniad Arddull Chicago

KERROD , ROBBIN. ALL ABOUT VOLCANOES: WORLD GREAT SCIENTIST SERIES.

Dyfyniad MLA

KERROD , ROBBIN. ALL ABOUT VOLCANOES: WORLD GREAT SCIENTIST SERIES.

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