(1996). Statistik Gas Kota = City Gas Statistics 1991-1995. Biro Pusat Statistik.
Lua i Stíl Chicago (17ú heag.)Statistik Gas Kota = City Gas Statistics 1991-1995. Biro Pusat Statistik, 1996.
Lua MLA (8ú heag.)Statistik Gas Kota = City Gas Statistics 1991-1995. Biro Pusat Statistik, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.