National Science Board (U.S.); National Science Foundation (U.S.). (2002). Science & engineering indicators 2002. For sale by the Supt. of Docs., U.S. G.P.O.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Science Board (U.S.); National Science Foundation (U.S.). Science & Engineering Indicators 2002. Arlington, Va. : National Science Foundation ; Washington, D.C: For sale by the Supt. of Docs., U.S. G.P.O, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Science Board (U.S.); National Science Foundation (U.S.). Science & Engineering Indicators 2002. For sale by the Supt. of Docs., U.S. G.P.O, 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.