ZIMMERMAN, J. D. (1966). Irrigation. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)ZIMMERMAN, Josef D. Irrigation. New York: John Wiley and Sons, 1966.
Lua MLA (9ú heag.)ZIMMERMAN, Josef D. Irrigation. John Wiley and Sons, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.