(1985). Standard Methods. APHA.
Lua i Stíl Chicago (17ú heag.)Standard Methods. APHA, 1985.
Lua MLA (8ú heag.)Standard Methods. APHA, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)