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