Sri Lanka. Janalēkhana hā Saṅkhyālēkhana Depārtamēntuva. (1985). Survey of household economic activities ... Sri Lanka. Dept. of Census and Statistics, Ministry of Plan Implementation.
Chicago-referens (17:e uppl.)Sri Lanka. Janalēkhana hā Saṅkhyālēkhana Depārtamēntuva. Survey of Household Economic Activities ... Sri Lanka. [Colombo]: Dept. of Census and Statistics, Ministry of Plan Implementation, 1985.
MLA-referens (8:e uppl.)Sri Lanka. Janalēkhana hā Saṅkhyālēkhana Depārtamēntuva. Survey of Household Economic Activities ... Sri Lanka. Dept. of Census and Statistics, Ministry of Plan Implementation, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.