(1974). Government reference books 72/73: A biennial guide to U.S. Government Publications (3d biennial ed.). Libraries Unlimited, Inc.
Citazione stile Chigago Style (17a edizione)Government Reference Books 72/73: A Biennial Guide to U.S. Government Publications. 3d biennial ed. Littleton, Colo: Libraries Unlimited, Inc, 1974.
Citatione MLA (9a ed.)Government Reference Books 72/73: A Biennial Guide to U.S. Government Publications. 3d biennial ed. Libraries Unlimited, Inc, 1974.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.