KERROD , R. ALL ABOUT VOLCANOES: WORLD GREAT SCIENTIST SERIES.
Cita Chicago (17th ed.)KERROD , ROBBIN. ALL ABOUT VOLCANOES: WORLD GREAT SCIENTIST SERIES.
Cita MLA (9th ed.)KERROD , ROBBIN. ALL ABOUT VOLCANOES: WORLD GREAT SCIENTIST SERIES.
Atenció: Aquestes cites poden no estar 100% correctes.