National Science Foundation - office of Special studies. (1958). Research and Development and its Impact on the Economy A Selected Bibliography. National Science Foundation - office of Special studies.
芝加哥风格引文National Science Foundation - office of Special studies. Research and Development and Its Impact on the Economy A Selected Bibliography. Washington: National Science Foundation - office of Special studies, 1958.
MLA引文National Science Foundation - office of Special studies. Research and Development and Its Impact on the Economy A Selected Bibliography. National Science Foundation - office of Special studies, 1958.
警告：这些引文格式不一定是100％准确.