MARA, D. (1976). Sewage Treatment In Hot Climates Duncan Mara. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)MARA, Duncan. Sewage Treatment In Hot Climates Duncan Mara. John Wiley & Sons, 1976.
Lua MLA (8ú heag.)MARA, Duncan. Sewage Treatment In Hot Climates Duncan Mara. John Wiley & Sons, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.