SMITH, J. (1961). Industrial Sociologay J.h. Smith. UNESCO.
Lua i Stíl Chicago (17ú heag.)SMITH, J.H. Industrial Sociologay J.h. Smith. UNESCO, 1961.
Lua MLA (8ú heag.)SMITH, J.H. Industrial Sociologay J.h. Smith. UNESCO, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.