National Research Council & Curtis, R. B. (1969). The Invisible university: Postdoctoral education in the United States. Report of a study conducted under the auspices of the National Research Council. National Academy of Sciences.
芝加哥风格引文National Research Council 与 Richard Bertram Curtis. The Invisible University: Postdoctoral Education in the United States. Report of a Study Conducted Under the Auspices of the National Research Council. Washington: National Academy of Sciences, 1969.
MLA引文National Research Council 与 Richard Bertram Curtis. The Invisible University: Postdoctoral Education in the United States. Report of a Study Conducted Under the Auspices of the National Research Council. National Academy of Sciences, 1969.