Boothroyd Jennifer. (2009). First Step Non Fiction What Is A Liquid. Lerner.
芝加哥风格引文Boothroyd Jennifer. First Step Non Fiction What Is A Liquid. UK: Lerner, 2009.
MLA引文Boothroyd Jennifer. First Step Non Fiction What Is A Liquid. Lerner, 2009.
警告：这些引文格式不一定是100％准确.