DeWitt, N. (1961). Education and professional employment in the U.S.S.R. Prepared for the National Science Foundation by the Office of Scientific Personnel, National Academy of Sciences-National Research Council. National Science Foundation.
Παραπομπή σε μορφή Chicago (17η εκδ.)DeWitt, Nicholas. Education and Professional Employment in the U.S.S.R. Prepared for the National Science Foundation by the Office of Scientific Personnel, National Academy of Sciences-National Research Council. [Washington]: National Science Foundation, 1961.
Παραπομπή σε μορφή MLA (8th εκδ.)DeWitt, Nicholas. Education and Professional Employment in the U.S.S.R. Prepared for the National Science Foundation by the Office of Scientific Personnel, National Academy of Sciences-National Research Council. National Science Foundation, 1961.