Gustafsson, B. (1989). The Political Economy of Social Security. ELSEVIER.
芝加哥风格引文Gustafsson, B.A. The Political Economy of Social Security. ELSEVIER, 1989.
MLA引文Gustafsson, B.A. The Political Economy of Social Security. ELSEVIER, 1989.
警告：这些引文格式不一定是100％准确.