Ratsep, R. (1991). Biological variables for monitoring the effects of pollution in small catchment areas: A literature survey. Nordic Council of Ministers [u.a.].
Chicago-Zitierstil (17. Ausg.)Ratsep, Rein. Biological Variables for Monitoring the Effects of Pollution in Small Catchment Areas: A Literature Survey. Copenhagen [u.a.]: Nordic Council of Ministers [u.a.], 1991.
MLA-Zitierstil (9. Ausg.)Ratsep, Rein. Biological Variables for Monitoring the Effects of Pollution in Small Catchment Areas: A Literature Survey. Nordic Council of Ministers [u.a.], 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.