Hansen. Dear Neil Armstrong. Purdue University Press.
芝加哥风格引文Hansen. Dear Neil Armstrong. Purdue University Press.
MLA引文Hansen. Dear Neil Armstrong. Purdue University Press.
警告：这些引文格式不一定是100％准确.
APA引文
Hansen. Dear Neil Armstrong. Purdue University Press.
芝加哥风格引文Hansen. Dear Neil Armstrong. Purdue University Press.
MLA引文Hansen. Dear Neil Armstrong. Purdue University Press.