APA-čujuhus (7. p.)
Schnapf, L. P. (2003). States Beginning to Tighten Rules for Septic Tanks. Environmental Law Institute.
Chicago-čujuhus (17. p.)
Schnapf, Lawrence P. States Beginning to Tighten Rules for Septic Tanks. Washington, D.C.: Environmental Law Institute, 2003.
MLA-čujuhus (9. p.)
Schnapf, Lawrence P. States Beginning to Tighten Rules for Septic Tanks. Environmental Law Institute, 2003.
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