Erikson, E. H., & Holton, G. J. (1972). The twentieth-century sciences: Studies in the biography off ideas. Norton.
Lua i Stíl Chicago (17ú heag.)Erikson, Erik H., agus Gerald James Holton. The Twentieth-century Sciences: Studies in the Biography off Ideas. New York: Norton, 1972.
Lua MLA (9ú heag.)Erikson, Erik H., agus Gerald James Holton. The Twentieth-century Sciences: Studies in the Biography off Ideas. Norton, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.