Whalen. The NYPD's First Fifty Years. University of Nebraska Press.
芝加哥风格引文Whalen. The NYPD's First Fifty Years. University of Nebraska Press.
MLA引文Whalen. The NYPD's First Fifty Years. University of Nebraska Press.
警告：这些引文格式不一定是100％准确.
APA引文