Lua APA (7ú heag.)

Hardenbergh, W. A. Water supply and purification.

Lua i Stíl Chicago (17ú heag.)

Hardenbergh, W. A. Water Supply and Purification.

Lua MLA (8ú heag.)

Hardenbergh, W. A. Water Supply and Purification.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.