Library of Congress. General Reference and Bibliography Division & Orr, O. H. (1976). A guide to the study of the United States of America: Representative books reflecting the development of American life and thought, supplement 1956-1965. Library of Congress : for sale by the Supt. of Docs., U.S. Govt. Print. Off..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Library of Congress. General Reference and Bibliography Division và Oliver H. Orr. A Guide to the Study of the United States of America: Representative Books Reflecting the Development of American Life and Thought, Supplement 1956-1965. Washington: Library of Congress : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Library of Congress. General Reference and Bibliography Division và Oliver H. Orr. A Guide to the Study of the United States of America: Representative Books Reflecting the Development of American Life and Thought, Supplement 1956-1965. Library of Congress : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976.