Science Research Associates. (1965). Jobs in building construction trades. Science Research Associates.
Chicago-referens (17:e uppl.)Science Research Associates. Jobs in Building Construction Trades. Chicago: Science Research Associates, 1965.
MLA-referens (8:e uppl.)Science Research Associates. Jobs in Building Construction Trades. Science Research Associates, 1965.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.