-. Annual Report of The Librarian of Conggres: For the fiscal year ending June 30, 1972. Goverment Printing Office.
Dyfyniad Arddull Chicago-. Annual Report of The Librarian of Conggres: For the Fiscal Year Ending June 30, 1972. Goverment Printing Office.
Dyfyniad MLA-. Annual Report of The Librarian of Conggres: For the Fiscal Year Ending June 30, 1972. Goverment Printing Office.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.