APA استشهاد

Todd,Keith. (1980). Groundwater Hydrology (Second.). John &Wiley.

استشهاد بنمط شيكاغو

Todd,Keith. Groundwater Hydrology. Second. Newyork: John &Wiley, 1980.

MLA استشهاد

Todd,Keith. Groundwater Hydrology. Second. John &Wiley, 1980.