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