(1974). Government reference books 72/73: A biennial guide to U.S. Government Publications (3d biennial ed.). Libraries Unlimited, Inc.
芝加哥风格引文Government Reference Books 72/73: A Biennial Guide to U.S. Government Publications. 3d biennial ed. Littleton, Colo: Libraries Unlimited, Inc, 1974.
MLA引文Government Reference Books 72/73: A Biennial Guide to U.S. Government Publications. 3d biennial ed. Libraries Unlimited, Inc, 1974.
警告：这些引文格式不一定是100％准确.