Cita APA (7th ed.)

Ritchey, J. D., & Rumbaugh, J. O. (1996). Subsurface Fluid-Flow (Ground-Water and Vadose Zone) Modeling. American Society for Testing and Materials.

Cita Chicago (17th ed.)

Ritchey, Joseph D., i James O. Rumbaugh. Subsurface Fluid-Flow (Ground-Water and Vadose Zone) Modeling. 1916bRace Street, Philadelphia, PA 19103: American Society for Testing and Materials, 1996.

Cita MLA (9th ed.)

Ritchey, Joseph D., i James O. Rumbaugh. Subsurface Fluid-Flow (Ground-Water and Vadose Zone) Modeling. American Society for Testing and Materials, 1996.