Bernard, H. R., & Pelto, P. J. (1987). Technology and social change (2nd ed.). Waveland Press.
Lua i Stíl Chicago (17ú heag.)Bernard, Harvey Russell, agus Pertti J. Pelto. Technology and Social Change. 2nd ed. Prospect Heights, Ill: Waveland Press, 1987.
Lua MLA (9ú heag.)Bernard, Harvey Russell, agus Pertti J. Pelto. Technology and Social Change. 2nd ed. Waveland Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.