Natural Resources, Energy & Science Authority of Sri Lanka. Social science research methodology; seminar report, 24 August - 13 September 1980. Natural Resources.
Chicago-referens (17:e uppl.)Natural Resources, Energy & Science Authority of Sri Lanka. Social Science Research Methodology; Seminar Report, 24 August - 13 September 1980. s.l: Natural Resources.
MLA-referens (9:e uppl.)Natural Resources, Energy & Science Authority of Sri Lanka. Social Science Research Methodology; Seminar Report, 24 August - 13 September 1980. Natural Resources.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.