Butz, W. P. (1982). Demographic challenges in America's future. Rand.
芝加哥风格引文Butz, William P. Demographic Challenges in America's Future. Sta. Monica, Calif: Rand, 1982.
MLA引文Butz, William P. Demographic Challenges in America's Future. Rand, 1982.
警告：这些引文格式不一定是100％准确.