MELSEN, A. G. V. (1961). Science and technology. Duquesne Univ. Press.
Lua i Stíl Chicago (17ú heag.)MELSEN, Andrew G. Van. Science and Technology. New York: Duquesne Univ. Press, 1961.
Lua MLA (9ú heag.)MELSEN, Andrew G. Van. Science and Technology. Duquesne Univ. Press, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.