Walker Sally M. (2010). Early Bird Earth Science Volcanoes. Lerner.
Chicagoスタイル(17版)引用形式Walker Sally M. Early Bird Earth Science Volcanoes. Lerner, 2010.
MLA(9版)引用形式Walker Sally M. Early Bird Earth Science Volcanoes. Lerner, 2010.
警告: この引用は必ずしも正確ではありません.