APA (7th ed.) Citation

Graaf, J. M. d. (1987). Nonlinear diffusion problems in hydrology and biology.

Chicago Style (17th ed.) Citation

Graaf, Jeannette M. de. Nonlinear Diffusion Problems in Hydrology and Biology. 1987.

MLA (9th ed.) Citation

Graaf, Jeannette M. de. Nonlinear Diffusion Problems in Hydrology and Biology. 1987.

Warning: These citations may not always be 100% accurate.