Cita APA (7th ed.)

Ritchey, J. D., & Rumbaugh, J. O. (1996). Subsurface fluid-flow (ground water and vadose zone) modeling. ASTM.

Cita Chicago (17th ed.)

Ritchey, Joseph D., i James O. Rumbaugh. Subsurface Fluid-flow (ground Water and Vadose Zone) Modeling. West Conshohocken, P.A: ASTM, 1996.

Cita MLA (9th ed.)

Ritchey, Joseph D., i James O. Rumbaugh. Subsurface Fluid-flow (ground Water and Vadose Zone) Modeling. ASTM, 1996.