Counter, L. W. (1988). Septitank Systems Effects On Ground Water Quality Larry W. Canter And Robert C. Knox. Lewis.
Chicago-viite (17. p.)Counter, Larry W. Septitank Systems Effects On Ground Water Quality Larry W. Canter And Robert C. Knox. Lewis, 1988.
MLA-viite (8. p.)Counter, Larry W. Septitank Systems Effects On Ground Water Quality Larry W. Canter And Robert C. Knox. Lewis, 1988.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.