Ritchey, J. D., & Rumbaugh, J. O. (1996). Subsurface Fluid-Flow (Ground Water and Vadose Zone) Modeling. ASTM Special Technical Publication.
Chicago-viite (17. p.)Ritchey, Joseph D., ja James O. Rumbaugh. Subsurface Fluid-Flow (Ground Water and Vadose Zone) Modeling. USA: ASTM Special Technical Publication, 1996.
MLA-viite (9. p.)Ritchey, Joseph D., ja James O. Rumbaugh. Subsurface Fluid-Flow (Ground Water and Vadose Zone) Modeling. ASTM Special Technical Publication, 1996.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.