(1998). U.S. Decennial Life Tables for 1989 - 91 Vol. II. Public Health Services.
Chicago-Zitierstil (17. Ausg.)U.S. Decennial Life Tables for 1989 - 91 Vol. II. Hyattsville, Md.: Public Health Services, 1998.
MLA-Zitierstil (8. Ausg.)U.S. Decennial Life Tables for 1989 - 91 Vol. II. Public Health Services, 1998.
警告：這些引文格式不一定是100％准確.