(1974). Government reference books 72/73: A biennial guide to U.S. Government Publications (3d biennial ed.). Libraries Unlimited, Inc.
Lua i Stíl Chicago (17ú heag.)Government Reference Books 72/73: A Biennial Guide to U.S. Government Publications. 3d biennial ed. Littleton, Colo: Libraries Unlimited, Inc, 1974.
Lua MLA (9ú heag.)Government Reference Books 72/73: A Biennial Guide to U.S. Government Publications. 3d biennial ed. Libraries Unlimited, Inc, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.