-. Annual Report of The Librarian of Conggres: For the fiscal year ending June 30, 1972. Goverment Printing Office.
Lua i Stíl Chicago (17ú heag.)-. Annual Report of The Librarian of Conggres: For the Fiscal Year Ending June 30, 1972. Goverment Printing Office.
Lua MLA (8ú heag.)-. Annual Report of The Librarian of Conggres: For the Fiscal Year Ending June 30, 1972. Goverment Printing Office.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.