Haynes, R. M. (1982). Environmental science methods. Chapman and Hall.
Lua i Stíl Chicago (17ú heag.)Haynes, Robin M. Environmental Science Methods. London ; New York: Chapman and Hall, 1982.
Lua MLA (9ú heag.)Haynes, Robin M. Environmental Science Methods. Chapman and Hall, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.