Schaeffer, F. A. (1979). Whatever happened to the human race? Fleming H. Revell Co..
芝加哥风格引文Schaeffer, Francis A. Whatever Happened to the Human Race? New Jersey: Fleming H. Revell Co., 1979.
MLA引文Schaeffer, Francis A. Whatever Happened to the Human Race? Fleming H. Revell Co., 1979.
警告：这些引文格式不一定是100％准确.