Siebert, H. (1998). Redesigning social security. Tübingen.
Chicago Style CitationSiebert, Horst. Redesigning Social Security. Tübingen, 1998.
MLA引文Siebert, Horst. Redesigning Social Security. Tübingen, 1998.
警告：这些引文格式不一定是100％准确.
APA引文