Barr, G. (1958). Research ideas for young scientists. McGraw.
Lua i Stíl Chicago (17ú heag.)Barr, George. Research Ideas for Young Scientists. [S.l.]: McGraw, 1958.
Lua MLA (9ú heag.)Barr, George. Research Ideas for Young Scientists. McGraw, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.