Walker Sally M. (2010). Early Bird Earth Science Earthquakes. Lerner.
芝加哥风格引文Walker Sally M. Early Bird Earth Science Earthquakes. Lerner, 2010.
MLA引文Walker Sally M. Early Bird Earth Science Earthquakes. Lerner, 2010.
警告：这些引文格式不一定是100％准确.
APA引文