Cita APA (7th ed.)

(1992). Groundwater modeling utilities / William C. Walton.

Cita Chicago (17th ed.)

Groundwater Modeling Utilities / William C. Walton. 1992.

Cita MLA (9th ed.)

Groundwater Modeling Utilities / William C. Walton. 1992.

Atenció: Aquestes cites poden no estar 100% correctes.