Friesen. When Worlds Collide. University of Arizona Press.
芝加哥风格引文Friesen. When Worlds Collide. University of Arizona Press.
MLA引文Friesen. When Worlds Collide. University of Arizona Press.
警告：这些引文格式不一定是100％准确.
APA引文
Friesen. When Worlds Collide. University of Arizona Press.
芝加哥风格引文Friesen. When Worlds Collide. University of Arizona Press.
MLA引文Friesen. When Worlds Collide. University of Arizona Press.