Bustad, L. K. (1980). Animals, aging, and the aged. University of Minnesota Press.
芝加哥风格引文Bustad, Leo K. Animals, Aging, and the Aged. Minneapolis: University of Minnesota Press, 1980.
MLA引文Bustad, Leo K. Animals, Aging, and the Aged. University of Minnesota Press, 1980.
警告：这些引文格式不一定是100％准确.