APA (7th ed.) Citation

Ishii, A. L., Healy, R. W., & Striegl, R. G. (1989). A numerical solution for the diffusion equation in hydrogeologic systems. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ishii, Audrey L., R. W. Healy, and Robert G. Striegl. A Numerical Solution for the Diffusion Equation in Hydrogeologic Systems. Urbana, Illinois: U.S. Geological Survey, 1989.

MLA (9th ed.) Citation

Ishii, Audrey L., et al. A Numerical Solution for the Diffusion Equation in Hydrogeologic Systems. U.S. Geological Survey, 1989.