(1989). Economic survey 1989 (ed.). Central Bureau of statistics.
Lua i Stíl Chicago (17ú heag.)Economic Survey 1989. ed. Nairobi: Central Bureau of statistics, 1989.
Lua MLA (9ú heag.)Economic Survey 1989. ed. Central Bureau of statistics, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.